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FAU / Engineering / PSY 3213 / What does accuracy represent?

What does accuracy represent?

What does accuracy represent?

Description

School: Florida Atlantic University
Department: Engineering
Course: Research Methods in Psychology
Professor: David wolgin
Term: Spring 2017
Tags: Exam 2, research methods, and experimental
Cost: 50
Name: Exam II Study Guide
Description: Research Methods - Study Guide Exam 2
Uploaded: 03/24/2017
7 Pages 45 Views 3 Unlocks
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NOTES FOR EXAM #2If you want to learn more check out What are some deming’s quotes?

Validity and Reliability Ch. 4 (123 -129); Ch. 10 (292 -315)

  • Accuracy: represents the degree to which the measure yields results that agree with a known standard.

  • Systematic Error: constant amount of error that occurs within each measurement.
  • Accuracy of physical instruments used to measure can be calibrated against known standards.
  • For behavioral science, not psychological

  • Reliability: refers to the consistency of a measurement
  • Reliability doesn't indicate accuracy

  • Random Measurement Error: random fluctuations in the measuring situation that cause the obtained scores to deviate from a true score.
  • The greater the random error, the less reliable the measurement is

  • Test-Retest Reliability: way of measuring reliability; determined by administering the same measure to the same participants on two or more occasions, under equivalent test conditions.
  • Personality and intelligence tests are relatively stable can be measured over a short period of weeks
  • A strong correlation between sets of measurements shows higher reliability.

  • Internal-Consistency Reliability: consistency of a measure within itself.
  • Validity: does a measure actually assess what it is claimed to assess
  • Reliability does not guarantee the validity

  • Face Validity: concerns the degree to which the items on a measure appear to be reasonable.
  • It is possible for a test to have low face validity yet still measure what it claims to

  • Content Validity: degree to which the items on a measure adequately represent the entire range or set of items that could have been appropriately included.

If you want to learn more check out What is the inoculation theory of persuasion?

Don't forget about the age old question of Describe the economy in 1920's.

Don't forget about the age old question of What are the main types of population genetics?
Don't forget about the age old question of What are short tandem repeats and why are they important?

We also discuss several other topics like Is the rate of effusion and diffusion the same?

  • Criterion Validity: the ability of a measure to predict an outcome.

  • Predictive Validity: when a measure recorded at one time predicts a criterion that occurs in the future.
  • Concurrent Validity: when a measure predicts a criterion and the measure and criterion have been assessed at the same time

  • Construct Validity: when a measure truly assesses the construct that is claimed to assess/manipulate.
  • Convergent Validity
  • Discriminant Validity

~Chapter 10

  • Validity of inferences
  • Constructs
  • Statistical
  • Casual
  • Generalizability

  • Validity applies to inferences about studies or findings
  • Not studies or findings themselves

  • Construct Validity
  • Statistical Conclusion Validity: 
  • The proper statistical treatment of data and the soundness of the researchers’ statistical conclusions
  • Statistical significance between variables
  • Quantitative psych: research design, measurement of variables, stat analysis, and mathematical models of behavior.

  • Internal Validity: 
  • The degree to which we can be confident that a  study demonstrated that one variable had a causal effect on another variable
  • Ruling out of plausible alternative explanations for the findings
  • Confounding variables poor internal validity

  • External validity:
  • Generalizability of the findings beyond the present study
  • Generalization across populations settings and species

  • Ecological validity: 
  • The degree to which responses obtained in a research context generalize to behavior in natural settings
  • Discussed in reference to research setting and methods
  • Mundane Realism: surface similarity between the experimental environment and real-world settings.

  • Psychological Realism: represents the degree to which the experimental setting is made psychologically involving for participants.

  • Replication: process of repeating a study in order to determine whether the original findings will be upheld.

  • Bias Experiment: study that has some features of an experiment, but lacks key aspects of experimental control

Internal Validity Threats:

  1. History: ways that people naturally change over time, independent of their participation study
  2. Maturation: ways that people naturally change over time independent of their participation in a study
  • Changes can be cognitive or physical
  • Spontaneous remission

  1. Testing: concerns whether the act of measuring participant’s responses affect how they respond on subsequent measures.

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