Extraneous variables History: Intervention, between the beginning and end of an experiment, of outside variables that might change the dependent varia
{"Image DocumentName": "Extraneous variables History:", "Image ImageDescription": "Intervention, between the beginning and end of an experiment, of outside variables that might change the dependent variable. Maturation: Changes in subjects occurring during the experiment that are not related to the experiment but which might affect subjects\u2019 response to the treatment factor. Instrument variation: Changes in measurement instruments (e.g., interviews or observers) that might affect measurements. Selections bias: Systematic differences between the test group and the control group due to a biased selection process. \u00a9 Matthias Rauterberg. TU/e ID, 2009.", "Image XResolution": "37", "Image YResolution": "37", "Image ResolutionUnit": "Pixels/Centimeter", "Image Software": "SlidePlayer", "Image YCbCrPositioning": "Centered"}