Post a New Question

psy question

posted by .

A group of researchers is investigating the effects of gingko biloba on memory. During the first part of the study the animals learn to run a maze while they are not receiving the supplement; in the second part of the study the animals learn to run a different maze while they are receiving the supplement. In each case the researchers count how many trials it takes before the animals can run the maze pattern without making any errors. In this study, the independent variable is?


would the indep. variable be the supplement

  • psy question -

    Yes, the administration of the gingko biloba would be the independent variable.

    However, the experiment would be more effective if there was a control group that received a placebo in the second part of the experiment. Also the complexity of the two mazes is an extraneous variable that needs to be controlled.

    Here is a summary of the experimental method.

    An independent variable is the potential stimulus or cause, usually directly manipulated by the experimenter, so it could also be called a manipulative variable.

    A dependent variable is the response or measure of results.

    Extraneous variables — other than the independent variable — potentially can affect the dependent variable, so they must be controlled. If possible, you try to keep them constant between the experimental and control group.

    The experimental group receives the independent variable.

    The control group is similar to experimental, except it does not receive the independent variable. Extraneous variables are balanced between experimental and control groups.

    Types of experiments

    1. Single blind gives the control group a placebo — a substance that is inert, it has no physical effect. Subjects don't know if they are in experimental or control group to reduce placebo effect, a change in behavior solely due to believing that you are getting the independent variable.

    2. Double blind keeps both subjects and experimenter ignorant of group setup. Distribution of the independent variable and placebo is controlled by third party. This controls for experimenter bias and self-fulfilling prophecy. This means that experimenters with particular expectations are likely to consciously or unconsciously to bias the experiment and influence it to conform to their expectations.

    As an example, suppose you want to find out if fluorides reduce dental cavities. You would find two groups, trying to control the extraneous variables. Extraneous variables are found by surveying previous research in the area. In this case, you would match the groups in terms of previous history of cavities, diet and dental hygiene habits including how and how often they brush their teeth.

    The experimental group would get toothpaste with the independent variable, the fluoride, while the control group would not have the fluoride in their toothpaste. The toothpaste without the fluoride would be the placebo.

    The dependent variable would be the number of cavities after participating in the experiment for a time. The dependent variable indicates the results, but it is not the results. At the end of the experiment, both groups could have no change in cavities or one of the groups could have a greater reduction in cavities. (Of course, if the fluoride increased cavities, you wouldn't want to use it.) All of these varied results would be indicated in terms of the dependent variable.

    If only the subjects do not know who is getting the fluoride, it is a single blind experiment. If both the subjects and experimenter do not know, it is a double blind.

    I hope this helps. Thanks for asking.

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. Math

    3(-5)squared -2/-5(2)/2 squared I don't get the second part but... any number squared is positive so 3(-5) squared is 3x25 if only (-5) is squared. If the whole thing is squared then multiply first, (3x-5) then squared the answer. …
  2. Physics

    An automobile tire has a radius of 0.380 m, and its center moves forward with a linear speed of v = 19.0 m/s. (a) Determine the angular speed of the wheel. (Assume that there is no slipping of the surfaces in contact during the rolling …
  3. math sos.

    dURING THE FIRST PART OF A TRIP, A CONOEIST TRAVELS53 MILES AT A CERTAIN SPEED . The canoeist travels 9 miles on the second part of the tripat a speed 5 mph lower.The total time for the trip is 5 hrs, what was the speed on each part …
  4. same type of binomial theorem question

    Question: Find the first 3 terms in the expansion, in ascending powers of x, of (2 + x)^6. Hence, obtain the coefficient of x^2 in the expansion of (2 + x - x^2)^6 I know the first part of the question, and the first 3 terms are (64 …
  5. Algebra

    During the first part of a trip, a canoeist travels 98 miles at a certain speed. The canoeist travels 10 miles on the second part of the trip at a speed 5 mph slower. The total time for the trip is 3 hours. What was the speed on the …
  6. Algebra

    During the first part of a trip, a canoeist travels 57 miles at a certain speed. The canoeist travels 13 miles on the second trip at a speed 5 mph slower. The total time for the trip is 5 hrs. what was the speed on each part of the …
  7. algebra :( help me!!

    The table below shows the weekly earnings of two groups of employees working part-time at a local grocery store. GROUP A: $245, $224, $218, $295, $214, $312, $284 GROUP B: $223, $230, $310, $246, $295, $301, $215 PART A: What is the …
  8. Psychology

    What is the independent and dependent variable in this scenario: A Physiological Psychologist is interested in investigating the effects of a new anti-anxiety drug on maze running behaviour in rats. A pool of rats is divided into two …
  9. Statistics in Psychology

    Please Help! For the following, which type of t-test is required?
  10. rela

    in the lottery the reader first learn about the characters, setting, and plot. the second part mostly depends on dialogue, how does this change affect the pacing and mood of this part of the story.

More Similar Questions

Post a New Question