« previous next »

Author Question: To study the effects of aging, Professor Drake compares the reaction times of 60-year-olds with ... (Read 75 times)

Arii_bell

  • Hero Member
  • *****
  • Posts: 596
on: Jun 22, 2018
To study the effects of aging, Professor Drake compares the reaction times of 60-year-olds with those of 30-year-olds. She tests all younger subjects in the morning, and all older subjects in the afternoon.
 
  She concludes that aging causes a decline in the speed of responses. This study lacks ________ because of potential ________.
  A) external validity; demand characteristics
  B) external validity; confounds
  C) internal validity; demand characteristics
  D) internal validity; confounds

Question 2

Which of the following could be considered a limitation to the experimental method?
 
  A) The laboratory settings can be very artificial.
  B) The researcher can't make causal statements.
  C) The researcher has very little control over what happens in the study.
  D) The researcher can't manipulate the independent variable.


lkanara2

  • Sr. Member
  • ****
  • Posts: 329
Reply #1 on: Jun 22, 2018
Answer to Question 1

Answer: D

Answer to Question 2

Answer: A


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
« previous next »
 

Did you know?

In inpatient settings, adverse drug events account for an estimated one in three of all hospital adverse events. They affect approximately 2 million hospital stays every year, and prolong hospital stays by between one and five days.

Did you know?

Women are two-thirds more likely than men to develop irritable bowel syndrome. This may be attributable to hormonal changes related to their menstrual cycles.

Did you know?

About 80% of major fungal systemic infections are due to Candida albicans. Another form, Candida peritonitis, occurs most often in postoperative patients. A rare disease, Candida meningitis, may follow leukemia, kidney transplant, other immunosuppressed factors, or when suffering from Candida septicemia.

Did you know?

Serum cholesterol testing in adults is recommended every 1 to 5 years. People with diabetes and a family history of high cholesterol should be tested even more frequently.

Did you know?

Certain chemicals, after ingestion, can be converted by the body into cyanide. Most of these chemicals have been removed from the market, but some old nail polish remover, solvents, and plastics manufacturing solutions can contain these substances.

Effects of Learning on Neurogenesis Effects of Learning on Neurogenesis
Effects of Insulin and Glucagon on Glucose and Glycogen Effects of Insulin and Glucagon on Glucose and Glycogen
The effects of neonatal testosterone exposure on the size of the sexually dimorphic nuclei in male ... The effects of neonatal testosterone exposure on the size of the sexually dimorphic nuclei in male ...
The NIOSH Pocket Guide entry for gasoline. Useful information includes health effects and chemical ... The NIOSH Pocket Guide entry for gasoline. Useful information includes health effects and chemical ...
The Olestra study followed a sequence of steps The Olestra study followed a sequence of steps
Harvard Alumni Study show who are more physically active in middle adulthood Harvard Alumni Study show who are more physically active in middle adulthood
Video: Phases of the Female Reproductive Cycle - Hormonal regulation

For a complete list of videos, visit our video library