The information capacity of the human motor system in controlling the amplitude of movement¶
Fitts, P. M. (1954). The information capacity of the human motor system in controlling the amplitude of movement. Journal of Experimental Psychology.
Cited by¶
3 citations across 3 artifacts.
Each citation links to the sentence it supports in the citing article.
Domain-specific¶
- Fitts's Law
- Fitts's law (Paul Fitts, 1954) is the empirical regularity that the time required for a person to move an effector to acquire a target is a logarithmic function of the ratio of target distance to target width: MT = a + b · log₂(2D/W), where D is centre-to-centre distance from start to target, W is the width of the target (the spatial tolerance for acquisition), a is an empirically fit intercept capturing response-initiation overhead, and b is the slope, in seconds per bit — the per-bit cost of transmission through the movement channel, whose reciprocal is a rate in bits per second
This sourceThe intercept-and-slope regression form this sentence uses is a later reformulation; Fitts's paper fits no regression line.
Supported in partVerified against the source
- Fitts's law (Paul Fitts, 1954) is the empirical regularity that the time required for a person to move an effector to acquire a target is a logarithmic function of the ratio of target distance to target width: MT = a + b · log₂(2D/W), where D is centre-to-centre distance from start to target, W is the width of the target (the spatial tolerance for acquisition), a is an empirically fit intercept capturing response-initiation overhead, and b is the slope, in seconds per bit — the per-bit cost of transmission through the movement channel, whose reciprocal is a rate in bits per second
- Touch-Target Miss
- Touch Target Size
- The rule is grounded in Fitts's Law (Fitts 1954), which models target-acquisition time as a logarithmic function of the distance to the target and its width: small targets take longer to acquire; the law itself models time rather than error rate, though small targets close to adjacent controls also produce higher error rates
This sourceFitts's Law as a logarithmic model of target-acquisition time in the distance-to-width ratio. The formulation of movement time as T = a + b*log2(2D/W) with the index of difficulty in the amplitude-to-width ratio.
- The rule is grounded in Fitts's Law (Fitts 1954), which models target-acquisition time as a logarithmic function of the distance to the target and its width: small targets take longer to acquire; the law itself models time rather than error rate, though small targets close to adjacent controls also produce higher error rates
Verification¶
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