Infants across the world babble ____
a. the same sounds initially
b. completely different sounds based on their language
c. completely different sounds based on how much their parents speak to them
d. at exactly the same age
A. Initially, all infants babble the same sounds, but then those sounds that are not part of their language environment drop out later.
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Survey batteries
a. Are designed to identify student learning disabilities b. Are used to assess academic progress by measuring individuals' knowledge across broad content areas c. Provide an in-depth analysis of a student's skill competency in one academic subject d. Indicate the minimum level of skills needed to move from one grade level to another
When a researcher can make strong conclusions that the independent variable caused changes in the dependent variable, the study has high ________
A) complexity B) external validity C) internal validity D) experimenter bias