The
Effect of Number of Response Alternatives on Concurrent Scanning
R. Okada & D.Burrows |
Subjects
in a speeded recognition task were asked to decide if a test item
was identical to (same match) or had the same meaning as (synonym
match) any item in a short memorized list. In two baseline conditions,
subjects were asked to make just one type of comparison, either a
same match or a synonym match. In two conjoint conditions, subjects
were asked to make both types of comparisons simultaneously. In one
conjoint condition, subjects pressed a single positive response button
whenever either type of match occurred while in the other, subjects
pressed one positive response button when a synonym match occurred
and another positive response button when a same match occurred.
The data are consistent with a concurrent scanning model in which
both types of matches are performed simultaneously in that (a) on
positive trials, the rate of retrieving same and synonym information
in the conjoint and baseline conditions do not differ and (b) on
negative trials, the rate of retrieving information in the conjoint
condition is equivalent to the slower of the rates in the two baseline
conditions. These results suggest that identity and meaning information
can be retrieved simultaneously, even in the condition where the
type of match as well as the existence of a match has to be determined.
|