PS101 Lecture Notes - Statistical Inference, Statistical Hypothesis Testing, Central Tendency
Document Summary
50 mc choice arrive at 6:20 and write for 1 hour. Data collection techniques allow for empirical observation and measurement. Research methods: general stragegies for conducting scientific studies. Experiment=manipulation of one variable under controlled conditions so that resulting changes in another variable can be obseved: detection of cause and effect relationships. Independent vairable=variable manipulated dependent variable=variable affected by manipulation experimental group-subjects who receceive some special treatment in regard to the independent variable. Expose a single group to different conditions: reduces extraneous variables. Manipulate more than one independent variable: allows for study of interactions between variables. Use more than one dependent variable: obtains a more complete picture of effect of the independent variable, figure 2. 2. Strengths: conclusions about cause and effect can be drawn. Weaknesses: artificial nature of experiments, ethical and pratical issues. Methods used when a reasearches cannot manipulate the variables under study: naturalistic obsevation, case studies, survey"s.
