// multi-utility computation suite · offline · instant · precise
┌──────────────────────────┐
│ [c] calcalyst_ │
│ computation suite │
└──────────────────────────┘
// select a module to initialize
/ search↵ open firstesc close
// adsenseEMPTY_LEADER_SLOT728×90
// adsenseMOBILE_ANCHOR_SLOT320×50
// keyboard_shortcuts
/focus search
↑↓navigate module list
Enter
open first result from search
open highlighted
compute when module is open
compute when focused in a field
Escclose module · clear selection
⌫
psych.reaction-time-percentile Calculator
Converts a reaction time measurement in milliseconds to a percentile ranking against population norms, with separate benchmarks for visual and auditory stimuli. Average simple reaction time is ~250ms for visual and ~170ms for auditory; below 200ms visual is the top 10%.
Inputs
Reaction Time Ms
Duration of the process. Make sure units match the rate inputs (seconds, minutes, or hours).
Age Years
Age in completed years. Many health and fitness formulas adjust for age.
Task Type
Reference formula or conversion factor shown for context.
Results
z-score
Number of standard deviations a value is from the mean. |z| below 2: within normal range. |z| above 2: in the outer 5% of the distribution. |z| above 3: in the outer 0.3%.
percentile (lower=faster)
The value below which the given percentage of the data falls. The 90th percentile means 90% of values are below this point.
task type mean (ms)
Arithmetic average — sum divided by count. Simple and familiar, but pulled by outliers. If your data contains extreme values, the median may be more representative.
assessment
Sample size or count used in the calculation.
simple RT mean ~230ms
Arithmetic average — sum divided by count. Simple and familiar, but pulled by outliers. If your data contains extreme values, the median may be more representative.