Question

How do I design a correlational study examining the relationship of recall using ITI(inter trial interval), feedback percent, introversion/extroversion and number of digits recalled?

Answer 1

Intertrial interval is the amount of time between seperate trials in learning studies. It is typically measured from the start of one trial to the start of the next trial and therefore includes the time that stimuli are presented as well as the waiting period to the next trial. So in a Pavlovian conditioning experiment, if one rings the first bell (CS) for 10 seconds and gives food (US) at the end of the bell and then rings the bell for the 2nd pairing 50 seconds after food, the ITI is 60 sec. Learning typically improves with longer intertrial intervals .

Performing an action at a maximum speed or with a maximum strength simultaneously with two limbs leads to a lower performance than the sum of unimanual performances. This phenomenon is known as bilateral deficit. There is some evidence that the bilateral deficit changes over the lifespan, in a way that children and older adults show lower deficits than young adults. Inverse developmental changes of childrens' and older adults' brain structures connecting both hemispheres, i.e., the corpus callosum, might importantly contribute to this phenomenon. The seemingly similar developments have been observed with different experimental protocols in the different age groups, respectively. To test for similarities and differences in changes of the bilateral deficit at critical periods of the lifespan development of bimanual actions, children, young adults, and older adults performed a simple reaction time task uni- and bimanually. Reaction times and the resulting bilateral deficit, as well as reaction time variability were analyzed. As expected, reaction times were different for the young adults between the uni- and the bimanual task. Children and older adults performed both conditions with similar reaction times. However, a difference in the direction of the %bilateral deficit occurred between the two age groups. The findings demonstrated an absence of the bilateral deficit for children, but not for younger and older adults.