design for the average

the principle that equipment for human use should be designed for average human dimensions, thereby sacrificing the extreme dimensions (e.g., below the 5th and above the 95th percentiles). Although no truly “average” person exists, this principle is used when adjustable designs cannot be developed and it is impossible or impracticable to design for the extremes. Compare design for adjustable range; universal design.

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Psychology term of the day

January 30th 2025

inspiration–expiration ratio (I/E ratio)

Sorry, "inspiration-expiration-ratio-i-e-ratio" is not in the Dictionary of Psychology. Please report to APA if you believe this is an error.