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Five Choice Serial Reaction Time Task (5CSRTT)
SKU CS-958344
$6,990.00
IncludesStandard care
Operant conditioning chamber for measuring attention, impulse control, and executive function in rodents through five-choice spatial discrimination tasks.
Scientist guidance
Louise Corscadden, PhD
Director of Science · ConductScience
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Key Specifications
Full details →- Model fit
- ['Conductor', 'ConductVision']
- SKU family
- CS-958344
- Sizing
- Mouse 5CSRTT: Aperature Dimension: 1.3 x 1.2 x 1.2 cm width x height x depth, 1 cm above the floor; Interior Dimension: 20 x 20 x 25 cm; Rat CSRTT: Aperture dimension: 2.8 x 2.8 x 2.2 cm width x height x depth, 2 cm above the floor; Interior Dimension: 30 x 25 x 30 cm (width x depth x height)
- Ordering
- Online checkout and quote request available
- Category
- Behavioral Mazes
- Build notes
- Sound-proof insulation material
The Five Choice Serial Reaction Time Task (5CSRTT) is a standardized operant conditioning apparatus designed to measure attention, impulse control, and executive function in rodents. This behavioral testing system presents subjects with five spatial choice options in a controlled chamber environment, allowing researchers to assess sustained attention performance, premature responding, and response accuracy under varying stimulus conditions. The apparatus features five nose-poke apertures with LED visual stimuli, automated pellet dispensing for reinforcement, and comprehensive data collection capabilities through integrated software systems.
Available in configurations for both mice and rats, the 5CSRTT incorporates precise timing controls for stimulus presentation, inter-trial intervals, and response detection. The system includes shock grid capabilities for punishment paradigms, removable waste collection systems for extended testing sessions, and sound-proof isolation to minimize environmental interference. The apparatus integrates with Conductor and ConductVision software platforms for protocol management, real-time monitoring, and data analysis of attention-related behavioral measures.
How It Works
The 5CSRTT operates on principles of operant conditioning and spatial attention assessment. Subjects are presented with brief visual stimuli (LED lights) in one of five spatial locations (nose-poke apertures) during each trial. The animal must attend to the stimulus presentation and make a nose-poke response into the correct aperture within a defined response window to receive food reinforcement. Incorrect responses, omissions, or premature responses during the inter-trial interval are recorded as specific error types that reflect different aspects of attention and impulse control.
The apparatus employs infrared detection systems within each aperture to precisely register nose-poke responses and measure reaction times. Stimulus duration, inter-trial intervals, and reinforcement schedules are programmable through the integrated software, allowing researchers to manipulate task difficulty and cognitive load. The shock grid component enables implementation of punishment contingencies for incorrect responses, while the pellet dispenser provides automated reward delivery. Environmental isolation through sound-proof housing ensures consistent testing conditions and minimizes external distractions that could confound attention measurements.
Features & Benefits
Five nose-poke apertures with LED visual stimuli
Enables spatial attention assessment and choice reaction time measurements across multiple response locations.
Infrared-based detection system
Provides precise response detection and reaction time measurement without mechanical interference or wear issues.
Programmable shock grid (0.1-4.0 mA in 0.1 mA steps)
Allows implementation of punishment paradigms and motivation manipulation with precise current control for safety.
Automated pellet dispenser
Delivers consistent reinforcement timing and eliminates experimenter bias in reward administration during long testing sessions.
Species-specific chamber dimensions
Mouse and rat configurations ensure appropriate spatial scaling for natural behavior expression and response accessibility.
Sound-proof isolation housing
Minimizes environmental distractions and provides consistent testing conditions across sessions and subjects.
Adjustable LED intensity (0-100 lux)
Enables manipulation of stimulus salience and task difficulty for cognitive load studies and threshold assessments.
Removable waste collection system
Facilitates chamber cleaning and maintenance during extended behavioral protocols without disrupting testing schedules.
Sizes by model
| Measurement | Mouse 5CSRTT | Rat CSRTT |
|---|---|---|
| Size | Aperature Dimension: 1.3 x 1.2 x 1.2 cm width x height x depth, 1 cm above the floor; Interior Dimension: 20 x 20 x 25 cm | Aperture dimension: 2.8 x 2.8 x 2.2 cm width x height x depth, 2 cm above the floor; Interior Dimension: 30 x 25 x 30 cm (width x depth x height) |
- 5 nose poke apertures
- LED visual stimuli (IR Based)
- Incandescent house light
- Food magazine
- Shock Grid
- Pellet Dispenser
- Mouse 5CSRTT: Aperature Dimension: 1.3 x 1.2 x 1.2 cm width x height x depth, 1 cm above the floor
- Mouse 5CSRTT: Interior Dimension: 20 x 20 x 25 cm
- Rat CSRTT: Aperture dimension: 2.8 x 2.8 x 2.2 cm width x height x depth, 2 cm above the floor
- Rat CSRTT: Interior Dimension: 30 x 25 x 30 cm (width x depth x height)
Nose Poke Apertures
- 5
Shock Current Range
- 0.1 to 4.0 mA in 0.1 mA steps
Mouse Grid Rod Diameter
- 3mm
Mouse Grid Spacing
- 5mm
Rat Grid Rod Diameter
- 6mm
Rat Grid Spacing
- 10mm
Light Volume Range
- 0-100 with step 1
Light Measurement Unit
- Lux
Air Circulation
- one fan on the back wall
Configurable Color Lights
- optional
Software Compatibility
- ['Conductor', 'ConductVision']
Pellet Dispenser
- Maze Engineers' Pellet Dispenser
Shock Generator Location
- separate component outside the Isolation Cubicle
Removable Grid
- yes
Behavioral Construct
- Sustained attention
- Impulse control
- Executive function
- Response inhibition
- Choice reaction time
- Cognitive flexibility
Automation Level
- semi-automated
Material
- Sound-proof insulation material
Display Type
- LED
Research Domain
- Addiction Research
- Aging Research
- Anxiety and Depression
- Behavioral Pharmacology
- Learning and Memory
- Neuroscience
Compatible Tracking Software
- ConductVision
Shipping weight
- 6.06 lb
Shipping box
- L: 65.0 cm
- W: 36.0 cm
- H: 27.0 cm
| Feature | This Product | Typical Alternative | Advantage |
|---|---|---|---|
| Number of Choice Locations | 5 nose-poke apertures with individual LED stimuli | Entry-level systems often provide 2-3 choice options | More spatial locations increase task complexity and provide better assessment of attention span and working memory capacity. |
| Shock Current Precision | 0.1-4.0 mA in 0.1 mA steps with separate generator unit | Basic systems may offer broader step increments or limited current ranges | Fine current control enables precise motivation manipulation and strain-specific calibration for consistent behavioral effects. |
| Species Configurations | Purpose-built mouse and rat versions with species-specific dimensions | Single-size chambers with adjustable components | Optimized aperture sizing and chamber dimensions ensure appropriate spatial scaling for natural behavioral expression. |
| Detection Technology | Infrared beam-break detection in each aperture | Mechanical microswitches or capacitive sensors | Infrared detection eliminates mechanical wear issues and provides more sensitive response detection with precise timing measurement. |
| Environmental Isolation | Sound-proof insulation material with controlled ventilation | Basic enclosures with limited noise isolation | Comprehensive isolation ensures consistent testing conditions and reduces environmental confounds that could affect attention measurements. |
| LED Stimulus Control | 0-100 lux range with single-step resolution | Fixed intensity or limited adjustment options | Precise stimulus intensity control allows manipulation of task difficulty and assessment of attention thresholds across different lighting conditions. |
The 5CSRTT provides comprehensive attention assessment capabilities through five spatial choice locations, precise shock current control (0.1 mA steps), and species-optimized chamber configurations. The infrared detection system and sound-proof isolation ensure reliable data collection in controlled environmental conditions.
| Model | Size | SKU | Listed price | Status | Shipping box |
|---|---|---|---|---|---|
| Mouse 5CSRTT | Aperature Dimension: 1.3 x 1.2 x 1.2 cm width x height x depth, 1 cm above the floor; Interior Dimension: 20 x 20 x 25 cm | CS-958344 | $5,990.00 | Available | 20 x 20 x 25 cm |
| Rat CSRTT | Aperture dimension: 2.8 x 2.8 x 2.2 cm width x height x depth, 2 cm above the floor; Interior Dimension: 30 x 25 x 30 cm (width x depth x height) | CS-958344 | $6,990.00 | Available | 30 x 25 x 30 cm |
Neuroscience
Assessing sustained attention and impulse control deficits in mouse models of ADHD and neurodevelopmental disorders through spatial choice reaction time protocols.
Behavioral Pharmacology
Evaluating the effects of cognitive enhancers, stimulants, and antipsychotic compounds on attention performance and response inhibition in rodent subjects.
Learning and Memory
Investigating working memory capacity and cognitive flexibility through variable stimulus duration and spatial discrimination paradigms.
Anxiety and Depression
Measuring attention bias and cognitive dysfunction associated with anxiety and depressive-like states in rodent models.
Addiction Research
Studying impulsivity and attention deficits in animal models of substance use disorders and behavioral addictions.
Aging Research
Characterizing age-related decline in attention performance and executive function across different developmental and aging time points.
Practical Tips
Calibration
Verify infrared beam alignment in all apertures weekly by testing response detection sensitivity with a pencil or similar object.
Why: Misaligned sensors can cause missed responses or false detections that compromise attention measurement accuracy.
Maintenance
Clean apertures and LED surfaces with alcohol wipes after each testing session to prevent buildup of oils and debris.
Why: Contaminated surfaces can reduce LED intensity and interfere with infrared detection, affecting stimulus presentation consistency.
Best Practices
Maintain consistent pellet brand and batch across experimental phases to prevent motivation changes due to palatability differences.
Why: Reinforcement value variations can confound attention measurements by altering subject motivation rather than cognitive performance.
Troubleshooting
If subjects show position bias toward specific apertures, verify LED intensity calibration and check for environmental lighting interference.
Why: Uneven stimulus salience across locations can create artificial spatial preferences that mask true attention performance.
Data Quality
Monitor session-by-session performance stability before introducing experimental manipulations to establish reliable baseline measures.
Why: Stable baseline performance ensures that experimental effects reflect treatment responses rather than ongoing learning or motivation changes.
Safety
Test shock current output with appropriate measurement equipment before each experimental series and maintain current logs.
Why: Accurate shock intensity is critical for consistent motivation effects and animal welfare compliance in punishment paradigms.
Best Practices
Allow minimum 23-hour intervals between sessions to prevent fatigue effects and maintain consistent motivation levels.
Why: Adequate inter-session intervals ensure that performance reflects attention capacity rather than fatigue or satiation effects.
Troubleshooting
If pellet dispenser jams frequently, check pellet size specification and inspect delivery chute for wear or debris accumulation.
Why: Reliable reinforcement delivery is essential for maintaining learned behavior and preventing extinction during testing sessions.
Setup Guide
Chamber Inspection
Unpack and inspect all chamber components including apertures, LED systems, pellet dispenser, and shock grid assembly for proper installation and functionality.
Software Installation
Install Conductor or ConductVision software and establish communication between the control computer and chamber interface modules.
Pellet System Setup
Load appropriate food pellets into the dispenser and test delivery mechanism to ensure reliable reinforcement dispensing during trials.
Stimulus Calibration
Calibrate LED intensity levels using the 0-100 lux range controls and verify infrared detection sensitivity in all five apertures.
Protocol Configuration
Program initial training parameters including stimulus duration, inter-trial intervals, and response windows appropriate for subject species and training stage.
Environmental Setup
Position isolation cubicle in a quiet testing area and verify proper ventilation through the rear wall fan system.
System Validation
Conduct test trials without subjects to verify stimulus presentation timing, response detection, and data recording accuracy.
What’s in the Box
- 5CSRTT chamber with five nose-poke apertures
- LED stimulus system with infrared detection
- Pellet dispenser unit
- Shock grid assembly (removable)
- Food magazine
- Waste collection tray (removable)
- House light assembly
- Control interface cables
- User manual and protocol guide (typical)
- Software installation media (typical)
Warranty
ConductScience provides a standard one-year manufacturer warranty covering defects in materials and workmanship, with technical support for setup, calibration, and troubleshooting assistance.
Compliance
NIH Guide for Care and Use of Laboratory AnimalsCommonly used in behavioral research facilities subject to institutional animal care protocols for operant conditioning studies.
ARRIVE GuidelinesSupports standardized reporting of animal research methodology and experimental design in attention and cognition studies.
Q
What training progression is typically required before subjects can perform the standard 5CSRTT protocol?
A
Subjects typically require 2-3 weeks of initial training starting with continuous reinforcement for any nose-poke response, progressing through stimulus duration fading (from 10s to 1-2s), and finally implementing the full protocol with limited hold periods and punishment contingencies for incorrect responses.
Q
How does the infrared detection system differentiate between nose-poke responses and other chamber activity?
A
The infrared beam-break detection is positioned within each aperture at a depth that requires deliberate nose insertion rather than casual contact. The system registers response onset and offset timing to distinguish purposeful nose-pokes from incidental contact or grooming behaviors.
Q
Can the shock intensity be calibrated for different subject weights and strain sensitivities?
A
Yes, the shock generator provides 0.1 mA step resolution from 0.1-4.0 mA, allowing precise adjustment based on subject characteristics. Typical starting intensities are 0.2-0.4 mA for mice and 0.3-0.6 mA for rats, with individual titration based on response suppression effects.
Q
What data outputs are available for analysis of attention performance metrics?
A
The system records trial-by-trial data including response accuracy, reaction times, omissions, premature responses, perseverative responses, and magazine entries. Additional metrics include attention index calculations, impulse control ratios, and session-by-session learning curves exportable to standard analysis software.
Q
How does chamber ventilation affect stimulus detection and behavior during long sessions?
A
The rear-wall fan provides continuous air circulation to prevent CO2 buildup and odor accumulation that could influence behavior. Fan noise is consistent and becomes part of the baseline environment, while proper ventilation maintains subject alertness during extended testing sessions.
Q
What maintenance is required for the pellet dispenser and delivery accuracy?
A
Weekly inspection of pellet hopper levels, monthly cleaning of delivery chutes to prevent pellet dust buildup, and periodic calibration checks to ensure single-pellet delivery. Maze Engineers pellet dispensers require lubrication of mechanical components every 3-6 months depending on usage frequency.
Q
Can the apparatus accommodate pharmacological studies with vehicle and drug treatment groups?
A
Yes, the programmable protocol parameters allow for consistent baseline testing followed by post-injection sessions. The system can store multiple protocol configurations for different experimental phases, and the isolation housing minimizes stress from injection procedures conducted outside the chamber.
Have a question about this product?
Track rodents with ConductVision
ConductVision is our video-tracking software. Record your sessions on video, and it scores standard rodent tests, such as those listed below.
Examples of tests it scores
To check whether ConductVision scores your protocol in this apparatus, ask in your quote request.
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Creator Insights
Trevor W. RobbinsCo-developed the 5-choice serial reaction time task (1983)University of Cambridge
About the Creator
Trevor W. Robbins is Professor of Cognitive Neuroscience at the University of Cambridge, where he has spent most of his career in the Department of Psychology. With Marco Carli, Jeffrey Evenden and Barry Everitt he developed the five-choice serial reaction time task in 1983 to probe sustained visual attention and impulsivity in rodents. His research centers on fronto-striatal circuits and the neuropharmacology of attention, compulsivity and executive function, and he co-founded the Behavioural and Clinical Neuroscience Institute at Cambridge. The five-choice task has become one of the most widely used preclinical paradigms in attention and addiction neuroscience.
To view Trevor W. Robbins’s publications, visit PubMed.
Are you Trevor W. Robbins? to review your photo and bio, and find out how to submit Creator Insights.
ConductScience celebrates method creators: researchers who, through rigorous and often ingenious experiments, develop the tools that reveal how the brain and body work. These are real scientific discoveries that become everyday instruments for the labs that follow.
Foundational paper
- Carli, M., Robbins, T. W., Evenden, J. L., & Everitt, B. J. (1983). Effects of lesions to ascending noradrenergic neurones on performance of a 5-choice serial reaction task in rats. Behavioural Brain Research, 9(3), 361–380. doi:10.1016/0166-4328(83)90138-9
Use this apparatus with
The complete 5-Choice Serial Reaction Time Task workflow
Track behavior
No exact ConductVision 5-choice page is currently published. Nose-poke responses and latencies are normally logged by the chamber aperture sensors rather than overhead tracking; keep this as a roadmap gap.
Supporting page not yet builtRun protocol
No exact ConductMaze 5-choice protocol page is currently published. Training-stage progression, stimulus-duration reduction, and ITI schedules are normally configured on the operant controller; keep this as a roadmap gap.
Supporting page not yet builtAnalyze output
Summarize percent accuracy, omissions, premature and perseverative responses, and correct-response latency with quality-control flags.
5-Choice Serial Reaction Time Analyzer ->Configuration considerations
Common 5-Choice Serial Reaction Time Task setup decisions
Use these notes to scope species, cohort, tracking, and automation needs. Only verified product or support routes are linked from this section.
This product5-aperture wall
Standard 5-Choice Chamber
Operant chamber with a curved five-aperture stimulus wall, food magazine, and house light
Standard configuration for sustained visual attention, reporting accuracy, omissions, and premature responses as brief light stimuli appear in one of five apertures.
Quote
Request QuoteBuyableMouse or rat
Species-Scaled Chamber
Aperture size, spacing, and magazine height scaled for mouse or rat body size
Aperture spacing and poke-detection geometry change response mechanics, so the stimulus wall should match the species and reach of the cohort being tested.
Quote
View options ->SpecialtyChallenge variants
Attentional-Challenge Kit
Variable stimulus duration, variable ITI, and distractor-light modules for probe sessions
Best when the question is the limit of attentional capacity rather than baseline accuracy, using short stimuli, variable ITIs, or distractors to stress sustained attention and impulse control.
Quote
Request automation help§ 1
Introduction
The 5-Choice Serial Reaction Time Task (5-CSRTT) measures sustained visual attention and response control by requiring a rodent to detect a brief light in one of five apertures and respond there for reinforcement. Carli and colleagues developed the task to dissociate attentional from motor and motivational deficits after ascending noradrenergic lesions. 1
Beyond accuracy, the task yields separable indices of behaviour: omissions track engagement, premature responses index impulsivity, and perseverative responses index compulsivity. This separation has made the 5-CSRTT a standard assay in the behavioural pharmacology and functional neurochemistry of attention. 1
Food restriction and motivation, stimulus duration and inter-trial interval, training stage, and locomotor state all change accuracy and latency independent of attention. A defensible protocol fixes the stimulus and ITI parameters, records training stage, monitors body weight under restriction, and reads omissions and latency alongside accuracy. 1
§ 2
Methods
2.1 Procedure
Staged acquisition to a fixed stimulus duration and ITI, with accuracy, omission, and premature-response scoring under controlled motivation.
Pre-test setup
- 1.Food restriction and habituation: Establish a controlled feeding schedule and habituate animals to the chamber and food magazine so responding reflects attention rather than novelty or hunger extremes.
- 2.Magazine and poke training: Train magazine entries and aperture nose-pokes for reinforcement before any stimulus is introduced, so later sessions measure attention rather than instrumental learning.
- 3.Stage the difficulty: Reduce stimulus duration in stages across training and fix the final stimulus duration and inter-trial interval before collecting test data.
- 4.Define response windows: Set the limited-hold and ITI windows that classify correct, incorrect, premature, and omitted responses in advance so scoring is identical across groups.
Trial sequence
- 1.Initiate the trial: Begin each trial after a fixed ITI following a magazine entry, with all apertures dark.
- 2.Present the stimulus: Illuminate one of five apertures briefly and record a correct response as a nose-poke in the lit aperture within the limited hold.1
- 3.Classify the response: Score responses in an unlit aperture as incorrect, no response as an omission, and a response during the ITI before the stimulus as premature.3
- 4.Deliver reinforcement: Reinforce correct responses at the magazine and log correct-response latency and magazine latency for each trial.
- 5.Clean between subjects: Run the planned trials, then clean the chamber and apertures to remove odor and food residue before the next subject.
Critical methodological constraints
- Motivation and restriction. Body weight under food restriction sets baseline responding. Over- or under-restriction changes omissions and latency independent of attention; monitor and report weight.3
- Stimulus and ITI parameters. Stimulus duration and ITI define task difficulty. Pooling sessions run with different parameters confounds attentional load; fix and report them.2
- Training stage. Accuracy rises across staged training. A single session can confound attention with task acquisition; test only at a stable, pre-defined criterion stage.1
- Locomotor confound. General hyper- or hypo-activity changes premature responses and omissions. Read these indices together so a motor change is not read as an attentional one.
2.2 Measurement & Analysis
Core 5-CSRTT endpoints separating attention, impulsivity, compulsivity, and processing speed, with engagement quality control.
Accuracy
Attention
Percent correct of responses made (correct / (correct + incorrect)), the primary index of sustained visual attention.1
Omissions
Engagement and QC
Trials with no response within the limited hold, indexing engagement and flagging motivational or motor problems.3
Premature Responses
Impulsivity
Responses during the ITI before the stimulus appears, the standard index of waiting impulsivity.2
Perseverative Responses
Compulsivity
Repeated responses after a correct choice has been registered, indexing compulsive or perseverative responding.
Correct-Response Latency
Processing speed
Time from stimulus onset to a correct response, indexing detection and processing speed independent of accuracy.
+ Additional metrics: incorrect-response latency, magazine latency, trials completed, reinforcers earned, body weight under restriction, and per-session apparatus notes.
2.3 choice-accuracy fraction (analysis)
A compact fraction of made responses that were correct.
2.4 sample-size planning
Estimate the N per group needed to detect a literature-anchored attentional effect at the endpoint you plan to report. Override the defaults with your own pilot numbers.
§ 3
Results
PubMed publication counts, sample apparatus output, and recent papers from a dated PubMed snapshot.
3.1 Publication trends
PubMed volume and co-occurring behavioral methods for 5-choice serial reaction time studies.
3.2 Sample apparatus output
Representative output from a 5-CSRTT session at a fixed stimulus duration and ITI.
3.3 Recent findings (PubMed)
- Sep 2026PMID: 42730847
Functional Dissociation of Anterior Cingulate Cortex Excitatory and Inhibitory Neurons in Sustained Attention and Impulse Control.
Tan Y, Li R, Kong Z, et al.. Neurosci Bull. 2026 Sep 12.
Cognitive control, which is essential for goal-directed behavior, depends on the anterior cingulate cortex (ACC); however, the distinct roles of excitatory and inhibitory neurons remain unclear.
- 2026PMID: 42741440
Inhibited oligodendrogenesis impairs attention and motivation in adult mice regardless of repeated mild traumatic brain injury.
Gazdzinski LM, Mak J, Mellerup M, et al.. Front Behav Neurosci. 2026.
The brain's white matter is responsible for communication across the brain and because attention relies on coordinated communication among distributed brain networks, white matter dysfunction may contribute to attentional impairment.
- Aug 2026PMID: 42587263
Protective role of hemokinin-1 against age-dependent spatial memory and attention decline in mice.
Tajti BT, Kepe E, Simon DV, et al.. Geroscience. 2026 Aug 12.
Age-related cognitive decline is a major social and medical challenge, but its mechanisms remain poorly understood; prevention and therapy are unsatisfactory.
- Apr 2026PMID: 41671783
The effect of sensory deprivation and mutant gene dosage on seizures and sustained attention in a mouse model of absence epilepsy.
Ortiz E, Yang R, Sonesra A, et al.. Epilepsy Behav. 2026 Apr.
Attention-deficit/hyperactivity disorder (ADHD) is a frequent comorbidity in epilepsy, particularly absence epilepsy, but the mechanistic links between these conditions remain poorly understood.
- Mar 2026PMID: 41611009
Impulsivity and attentional dysfunction in DAT-AAA knock-in mice.
Fitzpatrick CM, McGirr JC, Petersen A, et al.. Prog Neuropsychopharmacol Biol Psychiatry. 2026 Mar 20.
Aberrant dopaminergic signaling is implicated in the core symptoms of attention deficit hyperactivity disorder (ADHD), including dysregulated attention, impulsivity, and hyperactivity.
- Jan 2026PMID: 41540503
Electrical stimulation of the vagus nerve improves amyloid pathology in delirium superimposed on dementia.
Song C, Wu PY, Huffman WJ, et al.. Bioelectron Med. 2026 Jan 16.
BACKGROUND: Delirium and delirium superimposed on dementia (DSD) are common complications affecting patients suffering from ongoing neurodegenerative pathologies. Peripheral surgical trauma can trigger neuroinflammation and ensuing DSD via mechanisms that remain poorly understood.
§ 4
Discussion
Limitations of the paradigm, methodological caveats, and current directions.
4.1 Common confounds
Variables that can shift 5-Choice Serial Reaction Time Task results apart from the effect under study.
Food restriction and motivation
Body weight under restriction sets baseline responding. Over- or under-restriction changes omissions and latency independent of attention, so weight must be monitored and reported.
Stimulus duration and ITI
These parameters define task difficulty and the rate of premature responses. Pooling sessions run with different settings confounds attentional load across conditions.
Training stage
Accuracy rises across staged training, so a single session can confound attention with task acquisition unless animals are tested at a stable criterion stage.
Satiety
Within-session satiety reduces responding and inflates omissions and latency late in a session, mimicking an attentional decline. Standardize session length and pre-session feeding.
Locomotor confound
General hyper- or hypo-activity shifts premature responses and omissions. Reading the indices together prevents a motor change being scored as an attentional one.
Preview exported markdown
## 5-Choice Serial Reaction Time Task — methods controls Confounds controlled in this protocol: - **Food restriction and motivation.** Body weight under restriction sets baseline responding. Over- or under-restriction changes omissions and latency independent of attention, so weight must be monitored and reported. - **Stimulus duration and ITI.** These parameters define task difficulty and the rate of premature responses. Pooling sessions run with different settings confounds attentional load across conditions. - **Training stage.** Accuracy rises across staged training, so a single session can confound attention with task acquisition unless animals are tested at a stable criterion stage. - **Satiety.** Within-session satiety reduces responding and inflates omissions and latency late in a session, mimicking an attentional decline. Standardize session length and pre-session feeding. - **Locomotor confound.** General hyper- or hypo-activity shifts premature responses and omissions. Reading the indices together prevents a motor change being scored as an attentional one.
4.2 Construct validity caveats
The 5-CSRTT is strongest when stimulus duration, ITI, training stage, and restriction level are fixed and reported before testing. Accuracy alone is a screening signal; a specific attentional effect is most defensible when accuracy, omissions, premature responses, and latency move in an interpretable pattern across the same cohort. 1
4.3 Special considerations
How do I tell attention from impulsivity?
Accuracy and omissions index attention and engagement, while premature responses index waiting impulsivity. Reading them together separates a true attentional change from impulsive responding that lowers measured accuracy.
Which probe stresses attention most?
Shortening the stimulus duration or adding a distractor probe taxes sustained attention, while lengthening the ITI taxes impulse control. Choose the probe that matches the construct you are testing and pre-register it.
How should I handle food restriction?
Use a controlled feeding schedule that holds body weight within a defined band, monitor weight across sessions, and report it. Restriction that is too severe or too mild changes omissions and latency independent of attention.
4.4 Current directions
Quarterly editorial review of emerging 5-Choice Serial Reaction Time Task methodology. Q2 2026
Methods
Parameter reporting standards
Reporting stimulus duration, ITI, limited hold, and training stage is increasingly expected so attentional load is comparable across labs and chamber models.
Emerging
Automated response logging
Aperture sensors and software logging capture premature and perseverative responses and latencies consistently, reducing observer burden across long sessions.
Methods
Construct-validity batteries
Pairing the 5-CSRTT with selected translational task batteries is used to anchor accuracy, impulsivity, and processing speed to defined cognitive constructs.
Emerging
Variable-challenge probe sessions
Short-stimulus, variable-ITI, and distractor probes are added to baseline training to map the limits of attentional capacity within one cohort.
§ 5
References
6 selected methods and validation references for 5-Choice Serial Reaction Time Task.
- Carli M, Robbins TW, Evenden JL, Everitt BJ. Effects of lesions to ascending noradrenergic neurones on performance of a 5-choice serial reaction task in rats: implications for theories of dorsal noradrenergic bundle function based on selective attention and arousal. Behav Brain Res. 1983;9(3):361-380. doi:10.1016/0166-4328(83)90138-9
- Robbins TW. The 5-choice serial reaction time task: behavioural pharmacology and functional neurochemistry. Psychopharmacology. 2002;163(3-4):362-380. doi:10.1007/s00213-002-1154-7
- Bari A, Dalley JW, Robbins TW. The application of the 5-choice serial reaction time task for the assessment of visual attentional processes and impulse control in rats. Nat Protoc. 2008;3(5):759-767. doi:10.1038/nprot.2008.41
- Dalley JW, Cardinal RN, Robbins TW. Prefrontal executive and cognitive functions in rodents: neural and neurochemical substrates. Neurosci Biobehav Rev. 2004;28(7):771-784. doi:10.1016/j.neubiorev.2004.09.006
- Lustig C, Kozak R, Sarter M, et al. CNTRICS final animal model task selection: control of attention. Neurosci Biobehav Rev. 2013;37(9 Pt B):2099-2110. doi:10.1016/j.neubiorev.2012.05.009
- Higgins GA, Silenieks LB. Rodent test of attention and impulsivity: the 5-choice serial reaction time task. Curr Protoc Pharmacol. 2017;78:5.49.1-5.49.34. doi:10.1002/cpph.27
Five Choice Serial Reaction Time Task (5CSRTT)
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