Classic T-shaped behavioral maze for assessing spatial learning, working memory, and choice behavior in mice and rats through spontaneous alternation and discrimination learning paradigms.
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Louise Corscadden, PhD
Director of Science · ConductScience
Ask Louise about T Maze fit, setup, configuration, or quote prep.
...spent in close interaction with familiar or unfamiliar mouse were measured. T-maze and Y-maze (Maze Engineers; Skokie, IL) cohort assessments were performed using previously described with video recordings...
Maze Engineers, the maker named in the paper, is part of ConductScience.
Mouse (Small): Length across T 66 cm · Stem length 30 cm; Mouse: Length across T 70 cm · Stem length 30 cm; Rat: Length across T 110 cm · Stem length 50 cm
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Category
Behavioral Mazes
Build notes
Confirm accessories, station layout, and support needs before purchase
The T-Maze is a fundamental behavioral testing apparatus designed for assessing spatial learning, working memory, and decision-making processes in rodents. This classic maze configuration consists of a central stem leading to two perpendicular arms, creating the characteristic T-shape that allows researchers to evaluate spontaneous alternation behavior, delayed alternation tasks, and choice discrimination learning.
Constructed from odor-free acrylic with clean ethanol compatibility, the apparatus is available in three size configurations optimized for different rodent species. The maze supports multiple experimental paradigms including spatial navigation testing, reward-based learning protocols, and memory assessment tasks commonly employed in neurobehavioral research and cognitive phenotyping studies.
How It Works
The T-Maze operates on the principle of spatial choice behavior, exploiting rodents' natural tendency for spontaneous alternation. In the most basic paradigm, animals are placed in the stem of the maze and allowed to choose between the two arms. Normal rodents exhibit approximately 60-80% alternation behavior, meaning they tend to enter the arm opposite to their previous choice on successive trials.
The maze can be configured for multiple experimental paradigms. In delayed alternation tasks, animals are first forced into one arm, then after a delay period, given free access to both arms. Working memory is assessed by measuring the animal's ability to remember the previously visited arm and choose the alternate arm. Reward-based protocols place food or water reinforcement in specific arms to assess learning acquisition and retention.
Data collection typically involves recording arm entry sequences, latency to make choices, and time spent in each arm. The apparatus supports both manual observation and automated tracking when integrated with video monitoring systems or photobeam detection arrays.
Features & Benefits
Three size configurations (Mouse small, Mouse, Rat)
Accommodates different rodent species with appropriate spatial scaling for natural movement and choice behavior expression.
Odor-free acrylic construction
Prevents olfactory cues from influencing choice behavior, ensuring spatial and cognitive factors drive decision-making.
70% ethanol compatible surfaces
Enables rapid inter-trial cleaning to eliminate scent trails while maintaining material integrity over repeated use.
Optional central partition modification
Creates confined start area for controlled trial initiation and prevents premature arm exploration during setup.
Available guillotine door system
Enables precise temporal control over arm access for delayed alternation and forced choice paradigms.
Modular food well integration
Supports reward-based learning protocols with standardized reinforcement delivery locations.
Multiple maze variation compatibility
Expandable to elevated, water-based, or multi-unit configurations for diverse experimental approaches.
Standardized arm dimensions
Ensures reproducible spatial relationships across studies and facilitates comparison with published literature protocols.
Add-ons and modifications
Add-on
Size
Price
Details
Food Wells
approx 1cm with lid
$100
Doors
$100
T Maze Stand
$210
Mouse stand (32 cm height). for Rat stand (45 cm height) (prices listed: $210, $240)
Escape Tubes
$350
Mouse (4cm diameter): Rat (8cm diameter) (prices listed: $350, $400)
Housing
$250
To fit. per housing
H Conversion
$1,000
may change if your T maze is larger than standard T maze used for return to start experiments, used in experiments that require many recurrent t
Add any of these to your quote request.
Sizes by model
Measurement
Mouse (Small)
Mouse
Rat
Length across T
66 cm
70 cm
110 cm
Stem length
30 cm
30 cm
50 cm
Arm length
30 cm
30 cm
50 cm
Width
6 cm
10 cm
10 cm
Wall height
20 cm
20 cm
30 cm
Notes
Acrylic
No Odors
Easy clean with 70% Ethanol
Mouse (Small): Without central partition
Mouse (Small): With central partition
Mouse (Small): Width 10 cm
Mouse (Small): Ideal for Stroke/Motor Lesions
Mouse: With central partition option, please notify
Rat: With central partition option, please notify
Shipping weight
15.0 lb
Shipping box
L: 117.0 cm
W: 66.0 cm
H: 10.0 cm
Feature
This Product
Typical Alternative
Advantage
Species Size Options
Three distinct size configurations (Mouse small, Mouse, Rat) with species-appropriate scaling
Many models offer single-size construction requiring adaptation for different species
Ensures optimal spatial scaling for natural movement patterns and choice behavior expression across rodent species.
Modification Compatibility
Extensive modification options including food wells, doors, light cues, backlights, and housing systems
Basic models often have limited modification capabilities
Enables protocol adaptation for diverse experimental paradigms without requiring multiple apparatus purchases.
Construction Material
Odor-free acrylic with 70% ethanol compatibility and optical clarity
Some alternatives use wood, metal, or lower-grade plastics with potential odor retention
Prevents olfactory cueing while enabling visual observation and maintaining chemical resistance for repeated cleaning cycles.
Arm Configuration Options
Multiple arm configurations from enclosed start with open goals to fully enclosed designs
Supports diverse behavioral paradigms from anxiety-related elevated protocols to controlled spatial memory assessment.
Central Partition System
Optional central partition with 10 cm corridor width modification
Many designs lack controlled start area options
Provides precise trial initiation control and prevents premature exploration during experimental setup phases.
The T-Maze distinguishes itself through comprehensive size scaling across rodent species, extensive modification compatibility, and specialized features for controlled behavioral assessment. The acrylic construction and optional partition systems support both basic alternation protocols and complex temporal discrimination paradigms.
Model
Size
SKU
Listed price
Status
Shipping box
Mouse (Small)
Length across T 66 cm · Stem length 30 cm · Arm length 30 cm · Width 6 cm
3401-03-CLEAR (+4)
$1,190.00
Available
117.0 × 66.0 × 10.0 cm
Mouse
Length across T 70 cm · Stem length 30 cm · Arm length 30 cm · Width 10 cm
3401-02-CLEAR (+5)
$1,290.00
Available
117.0 × 66.0 × 10.0 cm
Rat
Length across T 110 cm · Stem length 50 cm · Arm length 50 cm · Width 10 cm
3401-01-CLEAR (+5)
$1,790.00
Available
117.0 × 66.0 × 10.0 cm
Neuroscience
Evaluating hippocampus-dependent spatial working memory through spontaneous alternation tasks where rodents naturally alternate arm choices between consecutive trials.
Behavioral Pharmacology
Assessing cognitive effects of pharmaceutical compounds by measuring changes in alternation behavior and choice accuracy before and after drug administration.
Learning and Memory
Conducting delayed alternation experiments to measure working memory span by imposing varying delay intervals between forced and free choice trials.
Neurodegeneration
Monitoring cognitive decline progression in disease models by tracking deterioration in spontaneous alternation performance and spatial navigation accuracy.
Addiction Research
Investigating decision-making alterations in substance dependence models through reward-based choice paradigms and preference testing protocols.
Aging Research
Comparing spatial memory performance between young and aged cohorts to identify age-related cognitive changes and intervention effects.
Practical Tips
Calibration
Validate spontaneous alternation rates with control subjects before experimental use, targeting 60-80% alternation in healthy animals.
Inspect acrylic panels weekly for stress cracks or scratches that could create visual artifacts or compromise structural integrity.
Why: Early detection prevents apparatus failure during experiments and maintains consistent visual conditions across testing sessions.
Best Practices
Maintain consistent environmental lighting and minimize external visual cues that could bias arm choice selection.
Why: Spatial choice behavior should reflect internal navigation processes rather than external environmental asymmetries.
Troubleshooting
If alternation rates consistently fall below 50%, evaluate for systematic biases such as lighting gradients, odor trails, or apparatus positioning.
Why: Below-chance performance typically indicates environmental factors overwhelming natural alternation tendencies rather than cognitive impairment.
Data Quality
Record arm entry sequences, choice latencies, and time spent in each zone to capture comprehensive behavioral profiles beyond simple choice measures.
Why: Additional parameters provide insight into decision confidence, exploration patterns, and potential anxiety-related factors affecting choice behavior.
Safety
Allow complete ethanol evaporation between cleaning and animal placement to prevent respiratory irritation and behavioral artifacts.
Why: Residual ethanol vapors can cause avoidance behaviors and stress responses that confound spatial choice measurements.
Best Practices
Implement counterbalanced apparatus orientation across subjects to control for potential directional biases in the testing environment.
Why: Systematic rotation helps distinguish genuine spatial memory effects from environmental asymmetries that could influence arm preferences.
Data Quality
Establish clear arm entry criteria (e.g., all four paws past arm threshold) and apply consistently across all trials and subjects.
Why: Standardized entry definitions prevent scoring variability and ensure reliable measurement of choice behavior across experimental sessions.
Setup Guide
Unpack and Inspect
Remove maze components from packaging and inspect acrylic panels for damage or stress cracks that could affect structural integrity.
Assembly Configuration
Assemble the T-maze according to species requirements, ensuring proper alignment of stem and arm sections with secure panel connections.
Optional Modifications
Install any requested modifications such as food wells, guillotine doors, or central partitions according to experimental protocol requirements.
Surface Preparation
Clean all surfaces with 70% ethanol and allow complete drying to eliminate residual odors that could influence animal behavior.
Environmental Setup
Position maze in testing room with consistent lighting and minimal external visual cues that could bias arm choice behavior.
Baseline Validation
Conduct preliminary testing with control animals to verify spontaneous alternation rates fall within expected ranges before experimental use.
Protocol Implementation
Begin experimental sessions following established habituation periods and inter-trial cleaning protocols to maintain consistent testing conditions.
What’s in the Box
T-Maze apparatus (assembled or flat-pack depending on configuration)
Acrylic wall panels and base sections
Assembly hardware and connection elements (typical)
Cleaning and maintenance instructions (typical)
Protocol reference guide (typical)
Warranty
ConductScience provides a standard one-year manufacturer warranty covering material defects and workmanship issues. Technical support includes protocol consultation and troubleshooting assistance for experimental setup optimization.
Compliance
IACUC GuidelinesCommonly used in animal research protocols subject to institutional animal care and use committee oversight for behavioral testing procedures.
ARRIVE GuidelinesSupports standardized reporting requirements for animal research methodology and experimental design documentation.
Good Laboratory Practice (GLP)Compatible with GLP protocols for behavioral pharmacology studies requiring standardized apparatus and documentation procedures.
References
Background reading relevant to this product:
1.Norberto Cysne Coimbra et al. (2017) “Critical neuropsychobiological analysis of panic attack- and anticipatory anxiety-like behaviors in rodents confronted with snakes in polygonal arenas and complex labyrinths: a comparison to the elevated plus- and T-maze behavioral tests” Brazilian Journal of Psychiatrydoi:10.1590/1516-4446-2015-1895
2.Herbert Schwegler et al. (1990) “Hippocampal mossy fibers and radial-maze learning in the mouse: A correlation with spatial working memory but not with non-spatial reference memory” Neurosciencedoi:10.1016/0306-4522(90)90139-u
3.Charles V. Vorhees et al. (2006) “Morris water maze: procedures for assessing spatial and related forms of learning and memory” Nature Protocolsdoi:10.1038/nprot.2006.116
4.Rudi D'Hooge et al. (2001) “Applications of the Morris water maze in the study of learning and memory” Brain Research Reviewsdoi:10.1016/s0165-0173(01)00067-4
The T-Maze is a simple two-choice behavioral apparatus shaped like the letter T, used to assess spatial memory, learning, and decision-making in rodents through forced-choice alternation tasks.
Q
How does the T-Maze work?
A
Rodents start in the stem of the T and choose between the left or right goal arm. In rewarded alternation, animals learn to alternate choices to receive a food reward. Correct alternation percentage measures working memory performance.
Q
What research applications use the T-Maze?
A
The T-Maze is used in prefrontal cortex research, working memory studies, and reward-based learning paradigms. It is commonly applied in schizophrenia models, ADHD research, and pharmacological studies of cognition.
Have a question about this product?
Each paper below used this product. Under each title is the paper’s own sentence naming the equipment it used.
Muthukumar Karuppasamy, Katherine G English, James R Conner et al. · Communications Biology · 2025
From the methods
...spent in close interaction with familiar or unfamiliar mouse were measured. T-maze and Y-maze (Maze Engineers; Skokie, IL) cohort assessments were performed using previously described with video recordings...
Arish Mudra Rakshasa, Michelle T. Tong · Frontiers in Behavioral Neuroscience · 2020
From the methods
...socially-housed groups. All mice were habituated to the experimenter and to the T-maze apparatus (Maze Engineers, Boston, MA; stem 30 × 10 cm, arm length 30 cm each) used for the CBC test at the beginning of...
Anna Iacoangeli, Aderemi Dosunmu, Taesun Eom et al. · Learning & Memory · 2017
From the methods
A T-shaped gray plastic maze (obtained from Maze Engineers) featured three arms, one start arm and two goal arms, as shown in Figure 10 B. A central partition extended 7 cm into the start arm to prevent an animal, after entering the chosen goal arm, from sampling the opposite arm.
The same license also scores standard tests such as the open field, the elevated plus maze, the Y-maze and the Morris water maze. Results export as CSV files.
ECEdward C. TolmanEstablished cognitive-map theory underlying T-maze spatial learning (1948)University of California, Berkeley
About the Creator
Edward Chace Tolman (1886–1959) was an American experimental psychologist and longtime professor at the University of California, Berkeley. He developed purposive behaviorism, which brought cognitive variables — expectancy, purpose and spatial representation — into the study of animal behavior. His 1948 Psychological Review paper, drawn from two decades of maze research, argued that rats form internal cognitive maps rather than rote stimulus-response chains, reframing what maze performance measures. The T-maze apparatus predates Tolman and has no single inventor, but his 1948 synthesis remains the dominant theoretical anchor for spatial-choice and place-learning paradigms in behavioral neuroscience.
To view Edward C. Tolman’s publications, visit PubMed.
Did you work with Edward C. Tolman? to suggest corrections or share material for these 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
Tolman, E. C. (1948). Cognitive maps in rats and men. Psychological Review, 55(4), 189–208. doi:10.1037/h0061626
The T Maze is a two-choice apparatus used for spontaneous alternation, rewarded alternation, delayed alternation, and simple discrimination learning. Its value is experimental control: the researcher can reduce a spatial or working-memory question to a left-versus-right choice while still preserving clear apparatus geometry. 1
Spontaneous alternation relies on the natural tendency of rodents to explore a less recently visited arm, while rewarded and delayed alternation add motivation, rule learning, and retention demands. Those variants must be separated in the product page because they require different doors, reward wells, timing, and scoring rules. 1
T Maze data are easy to summarize but easy to overinterpret. Percent correct or alternation rate should be paired with side-bias checks, latency, omissions, forced-trial handling, reward motivation, and arm cleaning so a choice deficit is not mistaken for memory impairment without controls. 1
§ 2
Methods
2.1 Procedure
Two-choice alternation or discrimination testing with pre-defined side-bias and latency controls.
Pre-test setup
1.Choose variant: Define spontaneous alternation, rewarded alternation, delayed alternation, or cue/reward discrimination before equipment setup.
2.Habituate apparatus: Allow exploration without scoring until animals enter the start arm and both goal arms without excessive freezing or retreating.
3.Prepare reward or cue: For rewarded variants, standardize reward type, well position, deprivation schedule, and cleaning between trials.
4.Door timing: If doors are used, define forced-run, delay, choice-run, and inter-trial timing before data collection.
Trial sequence
1.Start placement: Place the subject in the start arm facing the choice point or according to the protocol-defined orientation.
2.Forced or sample phase: In delayed alternation, restrict access to one goal arm, allow the sample visit, then return the animal to the start or holding area.
3.Choice phase: Open access to both goal arms and record the first committed arm entry as the choice.1
4.Score outcome: Classify alternation, correct rewarded choice, incorrect choice, omission, or correction trial according to the pre-registered rule.
5.Reset maze: Clean arms, rebait wells if used, and counterbalance side rules across subjects or sessions.
Critical methodological constraints
Side bias. A strong left or right preference can look like poor alternation. Report side-bias checks and counterbalancing.
Motivation. Rewarded variants depend on consistent hunger state, reward preference, and reward visibility.
Trial definition. Decide whether correction trials count in performance metrics before the experiment starts.
Delay load. Delayed alternation changes task difficulty. Compare only cohorts tested under the same delay schedule.3
2.2 Measurement & Analysis
Core T Maze endpoints for choice accuracy, alternation, and decision quality.
Percent Correct
Rewarded or rule-based accuracy
Correct choices divided by total valid choice trials.
Alternation Rate
Spontaneous or delayed alternation
Trials in which the animal chooses the opposite goal arm from the previous visit.1
Choice Latency
Decision and motivation
Time from start release to committed goal-arm entry.
Side Bias
Validity control
Imbalance in left versus right choices independent of reward or alternation rule.
Omissions
Task engagement
Trials with no committed choice before the maximum duration.
Formula: correct choices / (correct choices + incorrect choices) x 100. Report chance level, omissions, side bias, and whether correction trials were included. 1
§ 3
Results
3.1 Sample apparatus output
Representative output from a rewarded T Maze alternation session.
Table 1 · Per-animal T Maze scoring output
Animal
Group
Correct
Trials
Latency (s)
Percent correct
TM-001
Control
17
20
4.8
85.0%
TM-002
Control
16
20
5.2
80.0%
TM-003
Control
18
20
4.5
90.0%
TM-004
Impaired
11
20
8.9
55.0%
TM-005
Impaired
10
20
9.4
50.0%
TM-006
Impaired
12
20
8.1
60.0%
Synthetic example for illustration only. Interpret accuracy with side-bias, omissions, and reward motivation.
§ 4
Discussion
Limitations of the paradigm, methodological caveats, and current directions.
4.1 Common confounds
Variables that can shift T Maze results apart from the effect under study.
Side preference
A fixed left or right preference can dominate choice accuracy, especially in early training.
Correction trials
Including correction trials in accuracy can inflate performance or obscure perseveration unless reported separately.
Reward motivation
Rewarded variants are sensitive to deprivation schedule, reward palatability, and satiety.
Delay sensitivity
Longer delay periods increase memory load and should not be pooled with zero-delay alternation sessions.
Arm odor
Residual reward or animal scent can bias choices unless the cleaning procedure is consistent.
4.2 Construct validity caveats
T Maze is intentionally simple, but that simplicity makes design decisions visible. A valid page or protocol should state task variant, first-entry criterion, chance level, correction-trial rule, side-bias handling, and delay schedule before summarizing accuracy. 1
4.3 Special considerations
When should I use Y Maze instead?
Use Y Maze when the goal is mostly spontaneous alternation with three-arm exploration and less reliance on doors or reward wells.
When should I use Radial Arm Maze instead?
Use Radial Arm Maze when the experiment needs more spatial locations, baited-arm memory load, and repeat-entry error classification.
Does T Maze require reward?
No. Spontaneous alternation can be run without food reward, but rewarded and delayed variants need stricter motivation and side-bias controls.
4.4 Current directions
Quarterly editorial review of emerging T Maze methodology. Q2 2026
Methods
Cleaner alternation definitions
Protocol pages increasingly distinguish spontaneous, rewarded, and delayed alternation rather than treating all T Maze tasks as equivalent.
Emerging
Door-controlled timing
Automated or semi-automated doors improve reproducibility for forced-choice and delay phases.
Methods
Bias-aware reporting
Side-bias and omission reporting are becoming minimum requirements for interpreting choice accuracy.
Emerging
Compact screening batteries
T Maze is often paired with Y Maze, Open Field, and Rotarod to separate working memory from locomotion and motivation.
§ 5
Background references
10 selected methods and validation studies of the T Maze, from any lab.
Deacon RMJ, Rawlins JNP. T-maze alternation in the rodent. Nat Protoc. 2006;1(1):7-12.doi:10.1038/nprot.2006.2
Lalonde R. The neurobiological basis of spontaneous alternation. Neurosci Biobehav Rev. 2002;26(1):91-104.doi:10.1016/S0149-7634(01)00041-0
Dudchenko PA. An overview of the tasks used to test working memory in rodents. Neurosci Biobehav Rev. 2004;28(7):699-709.doi:10.1016/j.neubiorev.2004.09.002
Shoji H, et al. Comprehensive behavioral test battery for mice. Curr Protoc Mouse Biol. 2012;2:153-187.Find source
Hughes RN. The value of spontaneous alternation behavior in laboratory rodents. Behav Pharmacol. 2004;15(4):287-293.Find source
Richman CL, Dember WN, Kim P. Spontaneous alternation behavior in animals: a review. Curr Psychol Res Rev. 1986;5:358-391.Find source
Douglas RJ. The hippocampus and behavior. Psychol Bull. 1967;67(6):416-442.Find source
Olton DS. Mazes, maps, and memory. Am Psychol. 1979;34(7):583-596.Find source
Kraeuter AK, Guest PC, Sarnyai Z. The Y-Maze for assessment of spatial working and reference memory in mice. Methods Mol Biol. 2019;1916:105-111.Find source
