Question

1. longitudinal research is complicated by high rates of:

a. deception
b. observation
c. attrition
d. generalization

1. which of the following correlation coefficients indicates the strongest relationship between two variables?

a. -.90
b. -.50
c. +.80
d. +.25

1. which of the following terms is most synonymous with validity?

a. consistency
b. uniformity
c. meaningful
d. accuracy

Explanation:

Question 6

Longitudinal research follows participants over time. Attrition (participants dropping out) complicates it, as loss of participants affects data integrity. Deception is unethical in most research, observation is a method, and generalization is about applying results. So high attrition rates complicate longitudinal research.

Correlation coefficients range from -1 to +1. The strength is determined by the absolute value. Among -0.90, -0.50, +0.80, +0.25, |-0.90| = 0.90 is the largest, indicating the strongest relationship (negative here, but strength depends on magnitude).

Validity refers to how meaningful/relevant a measure is (does it measure what it should?). Consistency is reliability, uniformity is about sameness, accuracy is about correctness. Meaningful aligns with validity (e.g., construct validity’s meaningfulness of the measure).

Answer:

C. attrition

Question 7