Figure 1. | Temporal structure in associative retrieval

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Temporal structure in associative retrieval

Figure 1.

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University College London, United Kingdom
Figure 1.
Download figureOpen in new tabFigure 1. Task design and behavior.

Subjects participated in a sensory preconditioning task comprising three phases: Association, Reward and Decision. (A) In the Association phase, subjects were exposed to pairs of stimuli (presented sequentially). One member (called Si) of each pair was taken from one of three classes (faces, bodies, and scenes); the other member (Sd) was a fractal. In the Reward phase, some of the fractals (labelled Sd+) were paired with reward; the others (labelled Sd−) were not. Through the pairing, this implicitly established a separation between Si+ and Si−. In the Decision phase, subjects chose between Si+ and Si− within the same category, or between Sd+ and Sd−. All photos shown are from and are in the public domain. (B) In the Decision phase, subjects displayed a strong preference for Sd+ over Sd− (p = 6.9 × 10−4, one-sample t-test). There was no preference at the group level for Si+ over Si−, but we exploited the variability between subjects for value-related analyses. The change in relative liking from before to after the experiment was more positive for Sd+ than Sd− (p = 0.04, one-sample t-test); but there was no significant difference between the changes for Si+ and Si−. Bar heights show group means and dots show individual subjects. Error bars show standard error of the mean.