Lever Press Rate
Active and inactive lever presses per time bin
ConductVision · Behavioral Analysis
Operant Conditioning Chamber
Automated reward-based learning with lever press, nose poke, and pellet delivery tracking.
RodentReward LearningAuto Export
ConductVision / Operant Conditioning Chamber
Recording / Trial 3subject tracked
Lever Presses142
Rewards Earned38
Response Rate4.7/min
Key Parameters
Metrics automatically extracted by ConductVision.
Reinforcement Ratio
Rewards earned relative to total responses
Breakpoint
Maximum ratio completed under progressive-ratio schedules
Response Latency
Time from cue onset to first correct response
Magazine Entries
Head entries into the reward receptacle
Discrimination Index
Active vs. inactive lever preference ratio
+ 6 more parameters trackedShow allHide
Inactive Lever Presses
Non-reinforced responses indicating motor activity or impulsivity
Reinforcement Rate
Rewards per minute across the session
Post-Reinforcement Pause
Delay after reward before resuming responding
Cumulative Record
Running total of responses over time — reveals schedule-typical patterns
Session Efficiency
Proportion of session spent in active responding vs pausing
Extinction Responding
Response rate after reinforcement is withdrawn
What is Operant Conditioning?
Operant conditioning chambers (Skinner boxes) are used to study instrumental learning — the relationship between voluntary actions and their consequences. Animals learn to perform specific responses such as lever presses or nose pokes to obtain food rewards or avoid aversive stimuli.
ConductVision integrates with chamber sensors to track lever presses, nose pokes, and magazine entries in real time. The software supports fixed-ratio, variable-ratio, progressive-ratio, and extinction schedules with automated session control.
Protocol Parameters
| Parameter | Description | Default |
|---|---|---|
| Chamber Size | Standard operant chamber dimensions | 22 × 18 × 13 cm (mouse) |
| Lever Type | Response manipulandum | Retractable lever or nose poke |
| Reward | Reinforcer delivered upon correct response | 20 mg sucrose pellet |
| Food Deprivation | Body weight maintained at | 85–90% free-feeding |
| Schedule (FR) | Fixed-ratio — reward after N responses | FR1, FR3, FR5 |
| Schedule (VR) | Variable-ratio — reward after average N responses | VR5, VR10 |
| Schedule (PR) | Progressive-ratio — increasing response requirement | 2× or Richardson-Roberts |
| Session Duration | Maximum session length | 30–60 min |
| Cue Light | Discriminative stimulus signaling reinforcement availability | LED above active lever |
| House Light | General chamber illumination | On during session |
| Time-Out | Post-reinforcement blackout period | 5–20 s |
Interpreting Results
↓
Decreased Breakpoint
Reduced motivation — lower maximum effort for reward, seen in anhedonia models and after dopamine depletion (6-OHDA).
↑
Increased Breakpoint
Enhanced reward motivation — elevated responding under progressive-ratio for drugs of abuse or palatable food.
↑
Elevated Inactive Presses
Impulsivity or motor hyperactivity — non-reinforced responding suggests impaired response inhibition.
↓
Reduced Discrimination
Impaired stimulus-response learning — failure to preferentially respond on the active lever indicates associative learning deficit.
↑
Increased Extinction Responding
Resistance to extinction — persistent responding after reinforcement removal, a hallmark of compulsive-like or addiction-like behavior.
↓
Decreased Response Rate
Motor or motivational deficit — overall response suppression from sedatives, neuroleptics, or anhedonia-inducing procedures.
Research Applications
Addiction & Reward
- Drug self-administration — cocaine, heroin, ethanol reinforcement under various schedules
- Motivation assessment — progressive-ratio breakpoint as reward valuation metric
- Relapse models — reinstatement by cue, context, stress, or drug prime after extinction
Learning & Cognition
- Associative learning — acquisition of lever-reward contingency under different schedules
- Reversal learning — response-outcome contingency switches for cognitive flexibility
- Attention — 5-choice serial reaction time task adaptation for sustained attention
Neuropsychiatric Models
- Anhedonia — reduced sucrose pellet breakpoint in chronic stress models
- Impulsivity — premature responding and inactive lever discrimination in ADHD models
- Compulsivity — perseverative responding despite aversive outcome (punishment-resistant)
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