Relation of serial position errors to doublet and split-doublet location in verbal maze pattern.

Doublet effects in the verbal maze during acquisition and relearning.

“…A logical comparison of any serial-position effect during acquisition and relearning should involve comparison of the magnitude of this effect relative to the magnitude of the total score for each condition. The %E -%C transform described by Ernst et al (1960) was used for this purpose. All subsequent analyses were based on this transformation of the data.…”

“…During the initial stages of acquisition an increase in errors at the second doublet position is found. This effect has been attributed to extraexperimentally learned response tendencies (Ernst et al, 1960). During the later stages of acquisition, a decrease rather than an increase in errors is found at the second position within the doublet.…”

“…The effect of the doublet (two successive identical responses) upon the serial-position error curve during acquisition of a verbal maze has been firmly established (e.g., Ernst, Hoffeld, Seidenstein, & Brogden, 1960;Thompson, Voss, & Brogden, 1957). The overall effect of the doublet is an increase in errors at the second position within the doublet relative to the errors made at comparable positions in a control maze.…”

Effects of interval between successive numbers and pattern in verbal learning.

“…In order to evaluate adequately the interaction effects involving the doublet, the total-errors data were subjected to an experimental minus control (E -C) transformation of the type employed by Ernst et al (1960). Separate E -C transformations were performed for the small and large IBSN conditions on the total errors at each doublet position and the two adjacent positions.…”

“…In addition, serial-position pattern effects (e.g., Ernst, Hoffeld, Seidenstein, & Brogden, 1960;Ernst, Thompson, & Brodgen, 1962;Namikas, Thompson, & Brogden, 1960) should vary as a function of the IBSN characteristics of the list in which the pattern appears. For example, the effect of the doublet (two successive identical responses) in a serial-anticipation task consists of a reduction in errors at the doublet locations and is ' Now at Kansas State University.…”