More Than One Independent Variable In Barbara's study of the effects of viewing angle and computer monitor displays on eye blink rate, the effect of viewing angle on blinking rate is called a(n)

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The effect of viewing angle on blinking rate in Barbara's study, where there is more than one independent variable (viewing angle and computer monitor displays), is referred to as a main effect. This is because it examines the impact of one independent variable (viewing angle) on the dependent variable (blinking rate) regardless of the levels of the other independent variable (computer monitor displays).

More Than One Independent Variable in Barbara's Study of the Effects