The name is absent

A "square-poor gestalt" card is one in which the nine items (three items from each of the
three categories) are distributed randomly such that no good gestalt is discernible in terms
of items from any one category. It subtends a visual angle of 2° 14' in width as well as
in-height. This category of cards served, in fact, two purposes. They were used as
stimulus cards without any good perceptual gestalt when the partial-report selection
criterion was category information. These cards also served as good spatial cards when
the partial-report selection criterion was spatial information.

A "column" card is one in which the nine items selected are cast in an arrangement that
readily suggests three columns of three items each. Items from any category do not form
any good discernible gestalt. It subtends a visual angle of 3° 57' in width and 2° 14' in
height.

There were two sets of 96 cards each for every one of the three kinds of displays. From
these six basic stimulus ensembles, six sets of experimental cards were formed. One such
set was used in training subjects, one for testing subjects on the whole-report task, two
for partial reports when category information was the selection criterion, and two for
partial reports when spatial information was the selection criterion. Details of the six
experimental sets of cards are as follows:

(1) Practice cards-- his deck of cards was made up of 24 square-good gestalt cards, 48
square-poor gestalt cards, and 24 column cards. Among the 24 square-good gestalt cards,
8 were chosen from letters, 8 from digits, and 8 from symbols.

(2) Whole-report cards-- This deck of cards was made up in the same way as the deck
used in training the subjects.

(3) Partial-report by category cards-- Each of the two decks of cards consisted of 48
square-good gestalt and 48 square-poor gestalt cards. Among the former, there were
equal numbers of letter, digit, and symbol cards.

(4) Partial-report by spatial location cards-- Each of the two decks of cards was made up
of 48 square-poor gestalt and 48 column cards.

Other aspects of the materials used were the same as those in Experiment 1.

Design. A 2 (recall by row or category) x 2 (good or bad perceptual grouping) x 4 (ISI)
factorial design with repeated measures on all factors was used. Whereas both the
perceptual and the ISI factors were within-session factors, the recall-instruction factor
was tested across sessions.

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