Which of the following is correct? Along with numerous effects on migrants’ host countries, migration also affects home countries by ______.
A. shrinking the labor market and economy
B. facilitating the spread of outside ideas and attitudes
C. creating tensions between social groups
D. increasing urban population and growth
B. facilitating the spread of outside ideas and attitudes
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By averaging the responses of many participants, researchers who use group designs
a. hope that idiosyncratic sources of error variance will cancel out b. increase error variance in the data c. eliminate threats to internal validity d. can determine how most of the participants responded e. can replicate the effect of the independent variable across participants
Order effects and carryover effects differ in that
a. carryover effects only occur when there are two independent variables. b. for carryover effects it doesn't matter which treatment occurs first, just how often it is repeated. c. for order effects it is only the ordinal position of the treatment that matters. d. for carryover effects it is only the ordinal position of the treatment that matters.