Endpoint methods library
Learning and task-completion endpoint

Escape latency

Time from trial start to reaching a hidden platform, escape box, shelter, goal arm, or other task-defined escape criterion.

Unit
seconds
Readout
Elapsed time from trial start to the escape criterion
Assays
Morris water maze, Barnes maze, learned helplessness, active avoidance, shuttle escape, shelter escape

Decision summary

Use escape latency when the task has a defined start, an escape goal, and repeated trials where latency can change with learning or impairment. Do not interpret latency as learning by itself: swim speed, vision, motivation, motor ability, search strategy, and task stress can all move the value. The endpoint is strongest when paired with path length, speed, errors, and probe or retention measures.

Primary valueElapsed time from trial start to the escape criterion
Common unitsSeconds, often capped at a maximum trial duration
Compatible assaysMorris water maze, Barnes maze, learned helplessness, active avoidance, shuttle escape, shelter escape
Required boundaryStart event, escape criterion, and cutoff rule
Do not infer aloneSpatial memory, motivation, helplessness, or sensory ability

Measurement notes

Define whether latency stops at platform contact, platform mounting, nose poke, box entry, shelter entry, or another event. For capped trials, preserve timeout flags instead of treating all capped latencies as equivalent performance.

Interpretation limit

Shorter latency can reflect learning, faster movement, procedural strategy, lower anxiety, or stronger motivation. Longer latency can reflect cognitive impairment, sensory deficits, low swim speed, fatigue, floating, thigmotaxis, or unclear goal cues.

Data capture

Store start timestamp, goal timestamp, cutoff flag, trial number, start position, path length, speed, errors, search strategy, platform or goal location, and environmental cue version.

Confound checks
  • Different trial cutoffs, start locations, or inter-trial intervals.
  • Swim speed, floating, visual impairment, motor impairment, or fatigue.
  • Unstable platform, escape box, odor, cue placement, or room geometry.
  • Procedural strategies that reduce latency without true spatial learning.
  • High stress or low motivation changing escape behavior independently of memory.
Reporting checklist
  • Task, apparatus dimensions, goal definition, and maximum trial duration.
  • Trial schedule, start-position rules, inter-trial interval, and training days.
  • Whether timeouts were assigned cutoff values or modeled separately.
  • Companion endpoints: path length, speed, errors, goal entries, and probe-trial occupancy.
  • Environmental cues, water temperature if applicable, lighting, and platform/goal visibility.
  • Blinding, exclusion rules, and animal-level aggregation method.
References

Evidence notes

Endpoint pages should cite the method literature behind the scored value and keep high-specificity protocol claims qualified unless the source supports them.

  1. Vorhees CV, Williams MT. Morris water maze: procedures for assessing spatial and related forms of learning and memory. Nat Protoc. 2006. doi:10.1038/nprot.2006.116.
  2. Bromley-Brits K, Deng Y, Song W. Morris water maze test for learning and memory deficits in Alzheimer disease model mice. J Vis Exp. 2011. doi:10.3791/2920.

Related workflow paths

Endpoint articles link to adjacent products, software workflows, and sibling endpoints where the connection is useful and already routable.

Morris water maze product

Apparatus path for spatial learning studies that commonly report escape latency.

ConductVision Morris water maze

Tracking workflow for latency, path length, speed, and search strategy.

Time in zone endpoint

Pair latency with probe-trial target-zone occupancy when testing spatial memory.