Question

QUESTION 41

1. Which of the following is a poorly constructed hypothesis?

   	A.	Self-esteem is related to how long a person will persist at a difficult task.
   	B.	Smaller class size is related to better academic performance.
   	C.	There is no relationship between fatigue and reaction time.
   	D.	Increased sugar consumption leads to increased activity levels.

1.66 points   

QUESTION 42

1. Lloyd is interested in the relationship between sugar intake and activity levels in children. He determines the amount of sugar children in his sample eat by interviewing their parents. Then he watches those children on the playground recording their activity levels. Lloyd is using the _________ research strategy.

   		observational
   		experimental
   		descriptive
   		correlational

1.66 points   

QUESTION 43

1. A researcher wants to know if standing during class lectures helps students remember information better than sitting. When students arrive to class, they sit in their chairs as normal, study a list of 100 words and then are given a memory test 5 minutes later. After a short break the students are asked to stand at ta table, study a list of 100 words and then are given a memory test 5 minutes later. The researcher finds that students perform better when sitting than when standing. Which of the following is the biggest threat to internal validity in this study?

   		Carryover effects
   		Placebo effects
   		Participant individual differences
   		Time-related confounds

Answer 1

41. The correct answer is Option D. Increased sugar consumption leads to increased activity levels is an example of a poorly constructed hypothesis.
42. The correct answer is Option D. He is using the correlational strategy.
43. The correct answer is Option A. The carryover effects are the biggest threat to internal validity in the study