Maggie, a participant in a longitudinal study, became "test-wise" over time. Her performance on the test improved with increased familiarity with the measure. This is an example of
A) biased sampling.
B) selective attrition.
C) practice effects.
D) cohort effects.
C
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According to Bowlby, the driving evolutionary purpose behind the attachment system is to _____
a. ensure that “contact comfort” is provided b. ensure proximity between infant and caregiver c. ensure that the infant receives food and oral gratification d. develop a basic sense of trust as quickly as possible
Sonal is at a brain research center, participating in a study. She is hooked up to a machine that measures electrical activity in her brain through the use of electrodes attached to her scalp. This description best characterizes which of the following techniques?
a. computed tomography b. electroencephalography c. positron emission tomography d. magnetic resonance imaging e. lesioning