3-ScientificMethods

3-ScientificMethods - Scientific Methods in Psychology Chapter 2(Part 2 Populations Samples l Usually in research we are asking questions about a

Info iconThis preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon
1 Scientific Methods in Psychology Chapter 2 (Part 2) l Usually in research we are asking questions about a large population of interest such as: n People diagnosed with depression n Workers in the United States n All humans l But it is not practical to study all the individuals in the population. l So we study a relatively small number of individuals from the population, and we generalize from that small number. l The small number of individuals is called a sample . l Sampling Procedures—how samples are drawn n Random sampling n Convenience sampling l Types of Samples n Representative samples have little or no Sampling Error . n Cross-cultural samples contain people from at least two distinct cultures.
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Research Designs l There are many methods used to study psychological phenomena. Every method has advantages and disadvantages. l Observational (non-experimental) designs do not allow for confident inferences about cause-and-effect. n Naturalistic Observation n Case History n Surveys n Correlational Studies Correlational Studies l Correlation is a measure of the relationship between two variables that are both outside of the investigator’s control. l The mathematical estimate of the strength and direction of a correlation is the correlation coefficient . l
Background image of page 2
Image of page 3
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 03/29/2008 for the course PSY 200 taught by Professor Craig during the Spring '08 term at N.C. State.

Page1 / 8

3-ScientificMethods - Scientific Methods in Psychology Chapter 2(Part 2 Populations Samples l Usually in research we are asking questions about a

This preview shows document pages 1 - 3. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online