Why are random assignment and experimental control two essential ingredients of an experiment?
What will be an ideal response?
Answer: Random assignment is the "great equalizer," and ensures that groups of participants are comparable to one another before the delivery of the independent variable. Control over extraneous variables ensures that any differences on the dependent variable are due to the manipulation of the independent variable only.
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Slowing of reaction time is usually quite significant after a person reaches middle age.
Answer the following statement true (T) or false (F)
Erikson is best known for his eight stages of psychosocial development. Consider the stage of trust versus mistrust and (A) identify when this stage occurs; (B) give a general description of a positive and negative development of this stage
What will be an ideal response?
The disadvantage of using an interquartile range is that
a. it discards too much of the data. b. it removes outliers only extremely high in value. c. the positive and negative deviations balance out. d. it is disproportionately influenced by outliers.
Reversible conditions such as depression and drug interactions can cause the symptoms of dementia
Indicate whether this statement is true or false.