• Summary
  • Contents
  • Subject index

A must-have reference resource for qualitative management researchers, this dictionary contains over 90 entries covering the fundamentals of qualitative methodologies; covering both analysis and implementation. Each entry gives an introduction to the topic, lists the key relevant features, gives a worked example, a concise summary and a selection of further reading suggestions. It is suitable for researchers and academics who need a handy and quick point of reference.

Internal and External Validity
Internal and external validity
Introduction

Internal validity and external validity are two sets of criteria that be used in evaluating the worthiness of an experimental design. Internal validity is the quality of an experimental design such that the results obtained can be attributed to the manipulation of the independent variable, whereas external validity is the quality of an experimental design such that the results can be generalized from the original sample and by extension, to the population from which the sample originated. Along with their seminal contribution to understanding and designing experiments, Campbell and Stanley (1963) identified threats to both internal and external validity.

Key Features and Example
Threats to Internal Validity

The following is a brief description of threats to the internal validity of an experiment.

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