PSY 3001W Lecture Notes - Lecture 9: Repeatability, Spurious Relationship
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A factor that covaries perfectly with the iv, so it is an alternative explanation for differences between groups. Example: plant food a is put on flowers on the deck, plant food b is put on flowers in the kitchen window. Spurious relationship: an apparent relationship between the iv and dv when the differences between groups in terms of the dv are caused by the confound. If the confound is the real cause of differences between the dv between groups (if the iv had no effect) then there is a spurious relationship between the iv and dv. There is a spurious relationship between plant food and growth: usually spurious relationship is used in situations with naturally occurring, correlated variables, confounds are usually errors in experimental design (that possibly can be controlled in some way). [measurement: assigning numbers or labels to observations to represent amounts or categories. [measurement scale: set of possible numbers or labels that can be assigned to measured items.
