Paradigm and Hypotheses

This document plots the results of a 30 min version of Online Cueing, in which subjects performed a simple 1-up, 2-down calibration procedure prior to performing the main cueing task - adjusting the contrast of the target. Following calibration, in which subjects performed the discrimination task in the absence of cues, subjects completed 8 blocks of a simple exogenous cueing task. Subjects are asked to keep their eyes at the center of the screen and monitor two possible target locations on either side of the screen for the occurrence of the target. Prior to the target appearing, a random one of these target locations flashes white. Subjects are informed that this flash is random and meant to be distracting, and therefore should ignore it. Following the occurrence of the cue, the target appears. The target is a gabor patch oriented 30 degrees clockwise or counterclockwise from vertical, and is immediately followed by a visual noise mask at that location. At the end of each trial, subjects report which direction the target was turned and report how vividly they experienced the target using the Perceptual Awareness Scale. The scale has 4 points (colloquially outlined here): (1)no experience of the target, (2) something was there but I can’t tell you anything about it, (3) something was there and I have a good guess about what it was, and (4) explicit experience of the target. Subjects report the direction of the target turn using the n (CW) and m (CCW) keys, and the vividness rating using the 1-4 keys at the top of the keyboard.

Note: all error bars are within-subject SEM. Subjects who had a d’ of less than .5 or greater than 2.5 overall, or more than 10% of trials marked as RT outliers, were excluded.

Subject (N = 24) overall performance on cueing task, before exclusion

d’

Calibrated target contrast for each subject, before exclusion

orientation

Cueing task performance (N = 13) after exclusion

Target d’

d’ for clockwise/counter-clockwise target judgement based upon cue validity (valid vs. invalid). Error bars are within-subject SEM.

Size of d’ cueing effect for each subject

Correlation between overall d’ and cueing effect size

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Response Time

RT based upon cue validity (valid vs. invalid). Error bars are within-subjects.

Size of RT cueing effect in each subject

Average Vividness Response

Average vividness rating, based upon cue validity (valid or invalid)

Vividness Response Distribution

Distribution of vividness ratings, based upon cue validity (valid or invalid)

Control Analyses

Target d’ by target location