Operant conditioning chamber for measuring attention, impulse control, and executive function in rodents through five-choice spatial discrimination tasks.
Director of Science · ConductScience
Ask Louise about Five Choice Serial Reaction Time Task (5CSRTT) fit, setup, configuration, or quote prep.
Already working with us? Sign in to connect this with My Scientist.
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.
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.
| 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) |
| 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 |
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.
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.
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.
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.
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.
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.
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.
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.
ConductScience provides a standard one-year manufacturer warranty covering defects in materials and workmanship, with technical support for setup, calibration, and troubleshooting assistance.
What training progression is typically required before subjects can perform the standard 5CSRTT protocol?
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.
How does the infrared detection system differentiate between nose-poke responses and other chamber activity?
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.
Can the shock intensity be calibrated for different subject weights and strain sensitivities?
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.
What data outputs are available for analysis of attention performance metrics?
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.
How does chamber ventilation affect stimulus detection and behavior during long sessions?
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.
What maintenance is required for the pellet dispenser and delivery accuracy?
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.
Can the apparatus accommodate pharmacological studies with vehicle and drug treatment groups?
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.
Send it over and we'll email you a personalized answer — no call, no scheduling.
Prefer to talk it through?
Creator Insights
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.
Use this apparatus with
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 builtNo 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 builtSummarize percent accuracy, omissions, premature and perseverative responses, and correct-response latency with quality-control flags.
5-Choice Serial Reaction Time Analyzer ->Configuration considerations
Use these notes to scope species, cohort, tracking, and automation needs. Only verified product or support routes are linked from this section.
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 QuoteAperture 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 ->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
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
Staged acquisition to a fixed stimulus duration and ITI, with accuracy, omission, and premature-response scoring under controlled motivation.
Critical methodological constraints
Core 5-CSRTT endpoints separating attention, impulsivity, compulsivity, and processing speed, with engagement quality control.
Accuracy
Attention
Omissions
Engagement and QC
Premature Responses
Impulsivity
Perseverative Responses
Compulsivity
Correct-Response Latency
Processing speed
+ Additional metrics: incorrect-response latency, magazine latency, trials completed, reinforcers earned, body weight under restriction, and per-session apparatus notes.
A compact fraction of made responses that were correct.
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
PubMed publication counts, sample apparatus output, and recent papers from a dated PubMed snapshot.
PubMed volume and co-occurring behavioral methods for 5-choice serial reaction time studies.
Representative output from a 5-CSRTT session at a fixed stimulus duration and ITI.
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.
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.
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.
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.
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.
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
Limitations of the paradigm, methodological caveats, and current directions.
Variables that can shift 5-Choice Serial Reaction Time Task results apart from the effect under study.
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.
These parameters define task difficulty and the rate of premature responses. Pooling sessions run with different settings confounds attentional load across conditions.
Accuracy rises across staged training, so a single session can confound attention with task acquisition unless animals are tested at a stable criterion stage.
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.
General hyper- or hypo-activity shifts premature responses and omissions. Reading the indices together prevents a motor change being scored as an attentional one.
## 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.
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
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.
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.
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.
Quarterly editorial review of emerging 5-Choice Serial Reaction Time Task methodology. Q2 2026
Reporting stimulus duration, ITI, limited hold, and training stage is increasingly expected so attentional load is comparable across labs and chamber models.
Aperture sensors and software logging capture premature and perseverative responses and latencies consistently, reducing observer burden across long sessions.
Pairing the 5-CSRTT with selected translational task batteries is used to anchor accuracy, impulsivity, and processing speed to defined cognitive constructs.
Short-stimulus, variable-ITI, and distractor probes are added to baseline training to map the limits of attentional capacity within one cohort.
§ 5
6 selected methods and validation references for 5-Choice Serial Reaction Time Task.
