Robinson manipulates two variables in his experimental investigation of test-taking performance: the number of participants seated in the room and the room temperature. He finds that regardless of the temperature in the room, participants do better on the test when the room is less crowded. Which statement about this study is true?
a. There are two independent variables in this study.
b. There is one independent variable in this study.
c. There are two dependent variables in this study.
d. There are two dependent and two independent variables in this study.
a
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Tomasello and Farrar found that infants who developed larger vocabularies had mothers
who __________ early in life. a. read to them b. hugged and cuddled with them c. talked mostly about the objects their infants gazed at d. imitated their speech e. directed their attention to their infants
Bundles of protein that develop in the space between neurons are called ______.
A. clusters B. tangles C. tau D. plaques
While looking at slides of brain tissue in a physiology class, a student sees groups of damaged neurons that have collected around a core of protein. What is the student looking at?
A. Neurotransmitters B. Neuritic plaques C. Neurofibrillary tangles D. Selective serotonin reuptake inhibitors
By about ________ months of age, a child can typically solve invisible displacement problems
A) 3 B) 6 C) 24 D) 18