Statistical Methods in Psychology

Statistical Methods in Psychology

Overview of Statistical Methods

  • Importance of statistical methods in psychology to interpret research data.

  • Aid in summarizing data and determining the likelihood that observed patterns are due to chance.

Categories of Statistical Procedures

  1. Descriptive Statistics

    • Used to summarize sets of data.

  2. Inferential Statistics

    • Help researchers evaluate confidence in their findings and assess whether results are due to randomness.

Descriptive Statistics

  • Definition: All numerical methods for summarizing a data set.

  • Common types of descriptive statistics include:

    • Mean: The average value of a set of scores.

    • Median: The middle score when data values are sorted in ascending or descending order.

    • Measure of Variability: Indicates how spread out the scores are within a data set, such as range or standard deviation.

Describing a Set of Scores

  • Context of descriptive statistics applied: data from numerical measurements, such as ratings or survey responses.