Rods and cones are both types of _________
A) fovea
B) lenses
C) retinas
D) photoreceptors
Answer: D
Rationale: The specialized receptors of the retina are called photoreceptors. There are two general types of photoreceptors, rods and cones, and each respond to different characteristics of light.
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A. universal grammar B. reactionist approach C. language division approach D. cultural-learning theory
Automobile accidents
a. are the leading cause of death in U.S. children. b. have declined significantly in the U.S. over the past decade. c. are the sixth leading cause of death in U.S. children. d. occur more often among children from higher economic status families.
An independent-measures research study uses a total of 40 participants to compare two treatment conditions. What is the df value for the t statistic for this study?
a. 18 c. 38 b. 19 d. 39
The scores in a distribution with lower variability are very similar and clustered around a _______ value.
A. low B. middle C. high D. outlier