Preschool children are in a sandbox. Each is making "food" with the sand. They share the sand pails, shovels, and molds. These children are exhibiting
A) onlooker play.
B) associative play.
C) cooperative play.
D) parallel play.
B) associative play. When a child plays among other children, but his play is not well coordinated with their play it is associative play.
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A researcher selects a sample from a population with ?= 30 and uses the sample to evaluate the effect of a treatment. After treatment, the sample has a mean of M = 32 and a variance of s2 = 6 . Which of the following would definitely increase the likelihood of rejecting the null hypothesis?
a. Increase the sample size b. Increase the sample mean c. Decrease the sample variance d. All of the other options will increase the likelihood of rejecting the null hypothesis.
The heritability of a trait refers to
a. how many genes are involved in its heredity. b. the extent to which variability among people on the trait is explained by genetic factors. c. the percentage of genes involved in its heredity. d. the percentage of people who show an inheritance for the trait. e. the extent to which similarity among people on the traits is explained by environmental factors.
When you see someone you have a crush on and your heart pounds, your hands get sweaty, and your cheeks feel hot, your _____ is/are active
A) skeletal nervous system B) spinal reflexes C) autonomic nervous system D) somatic nervous system
A(n) ______ is an irrational behavior which you cannot control
a. compulsion b. obsession c. regression d. depression