Elsa is a one-year-old infant. Her mother notices that while playing in the garden, Elsa often picks up tiny insects and worms by making a tight fist. A few months before, she had only been able to pat the insects and not pick them up as they were so tiny. This is an example of _____
A) a pincer grasp
B) canalization
C) an ulnar grasp
D) habituation
A
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Professor Higgins is concerned about the findings of a longitudinal study on childhood depression that she conducted between 1985 and 2015 in New York because many of the participants witnessed the terrorist attacks on the World Trade Center. Professor Higgins is concerned about __________ effects
A) practice B) cross-sectional C) dropout D) cohort
A researcher might test the influence of environment on cognitive development by taking newborn children away from their parents and assigning half of them to a rich cognitive environment and half to a deprived cognitive environment. What is wrong with this experiment?
A. There is nothing wrong with this experiment. B. There is no control group. C. The experimental method violates ethical standards. D. There is no way to control for the Hawthorne effect.
Tennie is in her physiology lab and is working on a lab project. Her teacher hands out a syringe filled with an isotonic solution. The solution has
A. a higher concentration of solutes than normal body fluids. B. a lower concentration of solutes than normal body fluids. C. an equal concentration of solutes as normal body fluids. D. the same solutes in the same concentrations as normal body fluids.
The term hassles refers to
a. minor health problems that cause a person to miss at least one day of work. b. personal limitations that make it impossible for someone to pursue a desired goal. c. the necessity to interact with persons we dislike in order to obtain our goals. d. minor annoyances of everyday life. e. external stressors that have a positive health effect on an individual.