Good continuation revisited.

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Abstract
20 female university students inspected patterns of 3 lines of dots radiating from a common dot, in which 1 line (the shaft) was longer than the other 2 lines (the arms). Which arm the shaft appeared to group with, and which of 2 arms in different patterns the shaft grouped with more strongly, were predicted from 3 predictors: (a) rectilinearity-grouping is stronger with the arm closer to forming a 180. angle with the shaft, the function between strength of grouping and angle being nonlinear; (b) orientation-grouping is stronger with an arm on the vertical-horizontal rather than an oblique arm; and (c) enclosure-grouping is stronger when the arm closer to rectilinearity is ipsilateral with the other arm than when it is contralateral. Computer-generated predictions were correct 16/16 times when predicting grouping within individual patterns and were correct 103/109 times when predicting inequalities of grouping between patterns. (PsycINFO Database Record (c) 2006 APA, all rights reserved)

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