Musical tasks targeting preserved and impaired functions in two dementias.
Bottom Line: Behavioral and neural evidence confirms involvement of perceptual networks in imagery, and these are relatively spared in early stages of the illness.Thus, we expected patients to have relatively intact imagery in a mental pitch comparison task.We probed inhibitory skills by asking for a speeded pitch or timbre judgment when the irrelevant dimension was held constant or also changed.
Affiliation: Psychology Department, Bucknell University, Lewisburg, Pennsylvania.Show MeSH
Related in: MedlinePlus
Mentions: Block 3: blocked presentation, altering irrelevant dimension. There were four conditions presented in this block, reflecting the possible change of two elements: (1) type of judgment and (2) whether the irrelevant dimension was fixed or changed. This resulted in four subtypes of trials: pitch judgment with instrument fixed within pairs; pitch judgment with instrument change within pairs; instrument judgment with pitch fixed within pairs; instrument judgment with pitch change within pairs. Conditions are schematized in Figure1. Type of judgment was blocked, with a reminder screen showing which judgment to make (INSTRUMENT or PITCH) during sound presentation. Participants started with instrument judgments, then pitch. Between the two blocks, participants were instructed that the judgment would change and to pay attention to the reminder screen so as to make the correct judgment. Six same and six different pairs were presented for each condition, giving a total of 48 trials. Within each judgment block, trials were pseudorandomized (each participant was presented with the same prerandomized order) so that whether the irrelevant dimension was fixed or changed was unpredictable.
Affiliation: Psychology Department, Bucknell University, Lewisburg, Pennsylvania.