The measure has the same mathematical form whether the task design is of the tracing type or of the tracking type, and thus can be used in cross task type comparisons.
There was no feedback for cross task responses except during the practice trials.
Forty-eight new participants were recruited at UCL. Nine of the participants were excluded and replaced, either because they did not report awareness of the CS in the control trial, or because they responded incorrectly to the cross task in the critical trial, or because their mean error rate on the cross task was greater than 40%.
Of these, 25 participants were excluded and replaced, either because they did not report awareness of the CS in the control trial, or because they responded incorrectly to the cross task in the critical trial, or because their mean error rate on the high-load cross task was greater than 40%.
Of these, 7 were excluded and replaced, either because they did not report awareness of the CS in the control trial, or because they responded incorrectly to the cross task in the critical trial, or because their mean error rate on the cross task was greater than 40%.
Any participant who failed to report the presence of the CS in the control trial or who responded incorrectly to the cross task in the critical trial was excluded from the analysis and replaced with a new participant.
Awareness of the CS in the critical trial was assessed with an on-screen prompt, immediately following the cross task response, asking whether the participant had noticed anything different about the sound coming through the headphones during the last trial.
In addition, we changed the low-load cross task from a color discrimination to a line length discrimination with a far greater line length difference than in the high-load condition, so that the same task was performed in all trials.
A white fixation dot was presented at the center of a black screen for 900 ms at the start of each trial, followed by the cross display for 150 ms, and subsequently a black screen for 2.85 s, during which participants could make the cross task response.
He set out to be that person, crossing tasks off his "to do" list, including continuing his education at New York University and volunteering with Habitat for Humanity.
