Wednesday, February 11, 2015

Research Methods

Hypothesis- expresses a relationship between two variables

Independent Variable- whatever is being manipulated in the experiment

Dependent Variable- whatever is being measured in the experiment

Confounding Variable- anything that could cause a change in B that is not A; an extra variable

Hawthorne Effect- knowing you are in an experiment changes the results

Operational Definition

  • explains what is meant in the hypothesis
  • will the variables be measured in "real life" terms?
Sampling- identify the subject population; must be representative of the population you want to study

Experimental Method- attempting to prove casual relationships; Cause = Effect

Correlational Method- expresses a relationship between two variables; does not show causation
  • Positive Correlation- variables go in the same direction
  • Negative Correlation- variables go in opposite directions
Survey Method- most common type of study in psychology and measures correlation
  • cheap and fast
  • needs a good random sample
Naturalistic Observation- watching subjects in their natural environment ,but does not manipulate the environment

Correlation Coefficient- number that measures strength of relationship; range is from -1 to 1; relationship gets weaker the closer it is to zero

Case Studies- detailed study of one or a few subjects; great story but just descriptive research; does not give correlation data


Statistics- recording results from studies
  • common language is needed for understanding
  • Descriptive Statistics- describes sets of data
  • Range- distance from highest value to lowest value
Standard Deviation- variance of scores around the mean; higher variance = more distribution spread

Z Scores- unit that measures the distance of one score from the mean
  • + = above the mean
  • - = below the mean

Ethical  Guidelines For Research

Animal Research
  • must have a clear purpose
  • must be treated in humane way
  • must acquire animals legally
  • least amount of suffering possible
Human Research
  • no coercion, must be voluntary
  • informed consent
  • anonymity
  • no significant risk
  • must debrief


Image result for statistics

Image result for survey pictures









3 comments:

  1. I like how your notes were short and straight to the point but I would probably add more examples and highlight key ideas and important things to know. Especially about the different research methods

    ReplyDelete
  2. I would not think that some of the stuff in sociology would be shared with psychology. Now I can confirm it does.

    ReplyDelete
  3. Is the correlation all method an actual experimentation method or simply research? And what can you use it for precisely?

    ReplyDelete