Three models to account for discrimination times are examined : one being derived from information-theory, another being Grossman's Confusion Function and the third a form of Sequential Sampling model. Four experiments, using card-sorting tasks in which lines of different lengths had to be discriminated, wore conducted and the results compared with those of previous experiments. It was concluded that : 1.Experiments in this field may be divided hi to two types. Ono type (A) involves a series of judgments the difficulty of which differs randomly from one to another. The either type (B) involves a series of judgments all of the same degree of difficulty. Type B results in the present experiments were fitted moderately well by Crossman's Confusion Function, and somewhat less well by the Sequential Sampling model. They were not well fitted by the information-theory model. Type A results had previously been shown to be well fitted by an information-theory model when each individual discrimination was separated in time from others. It was found that when discriminations were made as a continuous series, the relationship between difficulty and discrimination time broke down

Theories and experiments on discrimination times / Shallice, Timothy; Vickers, D.. - In: ERGONOMICS. - ISSN 0014-0139. - 7:1(1964), pp. 37-49. [10.1080/00140136408930723]

Theories and experiments on discrimination times

Shallice, Timothy;
1964

Abstract

Three models to account for discrimination times are examined : one being derived from information-theory, another being Grossman's Confusion Function and the third a form of Sequential Sampling model. Four experiments, using card-sorting tasks in which lines of different lengths had to be discriminated, wore conducted and the results compared with those of previous experiments. It was concluded that : 1.Experiments in this field may be divided hi to two types. Ono type (A) involves a series of judgments the difficulty of which differs randomly from one to another. The either type (B) involves a series of judgments all of the same degree of difficulty. Type B results in the present experiments were fitted moderately well by Crossman's Confusion Function, and somewhat less well by the Sequential Sampling model. They were not well fitted by the information-theory model. Type A results had previously been shown to be well fitted by an information-theory model when each individual discrimination was separated in time from others. It was found that when discriminations were made as a continuous series, the relationship between difficulty and discrimination time broke down
7
1
37
49
Shallice, Timothy; Vickers, D.
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/20.500.11767/30476
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