Flashcards in 9.2 Measuring The Dependent Variable Deck (14):
The ____ ____ in most experiments is one of three general types: self-report, behavioural, or physiological.
____-____ can be used to measure attitudes and many other aspects of human thought and behaviour. Rating scales with descriptive anchors (endpoints) are most commonly used.
____ ____ are direct observations of behaviours.
____ ____ are recordings of responses of the body.
Many such physiological measures are available; examples include the ____ ____ ____ (GSR), ____ (EMG), and ____ (EEG).
galvanic skin response, electromyogram, and electroencephalogram
The GSR is a measure of general and emotional arousal and anxiety; it measures the ____ ____ of the skin, which changes when sweating occurs.
The EMG measures ____ ____ and is frequently used as a measure of tension or stress.
The EEG is a measure of ____ ____ of brain cells. It can be used to record general brain arousal as a response to different situations.
____ ____ ____ (MRI) provides an image of an individual's brain structure.
Magnetic resonance imaging
A ____ ___ (fMRI) allows researcher to scan areas of the brain while a research participant performs a physical or cognitive task.
Although it is convenient to describe single dependent variables, many studies include more than one dependent measure. One reason to use ____ ____ stems from the fact that a variable can be measured in a variety of concrete ways.
The issue of ____ is particularly important when measuring human performance. The dependent variable should be sensitive enough to detect differences between groups.
Sometimes a task is so easy that everyone does well regardless of the conditions. This results in what is called a ____ ____ – the independent variable appears to have no effect on the dependent measure only because participants quickly reach the maximum performance level.