In ANOVA, an independent variable studied using independent samples in all conditions is called a _______________ - subjects factor

Goiter, a condition in which the thyroid gland is enlarged, is most often associated a deficiency of which of the following nutrients?

a. iron b. protein c. vitamin A d. iodine

__________ is the maintenance of attention for infrequent events over long periods of time

a. Inhibition of return b. Visual search c. Vigilance d. Anticipatory processing