A researcher is concerned that a trip to the lab will differentially influence infant hormonal or
cortisol output before they even are administered their first cortisol test in the lab. What's the
best way to control for this concern?
A) Ask caregivers not to bring an infant to the lab if the baby was highly distressed earlier in
the day.
B) Ask a research assistant to drive each infant to and from their house to achieve
standardization.
C) To equalize things, administer a stressful procedure to all of the infants as soon as they
get to the lab and then assess cortisol release.
D) Ask the caregiver to collect some sample saliva swipes to assess normal, or baseline
cortisol levels; this assessment can be used as a control variable.
D
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Age-grading in schools contributes to
a. advance pubertal development. b. delays in pubertal development. c. the need for puberty rituals. d. social comparison of physical maturity.
The formation of a bond between some newborn animals (especially birds) and their mothers is called:
a. flocking b. connecting c. synchrony d. imprinting