A researcher uses a repeated-measures design to compare individuals' performance before treatment with their performance after treatment. If all of the participants show improved performance of 8 or 9 points after treatment, then the researcher should find ____
A) ?a sample mean difference near zero
B) ?a t statistic near zero
C) ?the variance of the difference scores is near zero
D) ?a very large variance in the difference scores
C
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The effects of maternal employment on child development are related to
a. the timing of the employment, or when the mother enters the workforce during the child's life. b. the continuity of the employment, or how consistently the mother works outside the home. c. both the timing and the continuity of maternal employment. d. neither the timing nor the continuity of maternal employment.
In the last few decades, the number of community organizations designed to involve older adults has a. increased significantly. b. decreased significantly. c. remained stable
d. decreased slightly.
Which statement about adolescents is FALSE?
A) The relationship between parents and adolescents becomes closer. B) Adolescents and their parents tend to disagree about the age at which certain adult behaviours become permissible. C) Adolescents argue with their parents most often over minor issues such as clothing and language. D) Adolescents argue more with their mothers than with their fathers.
Which view maintains that mental states just are states of the brain and central nervous system?