Vividness of Visual Imagery Questionnaire (VVIQ)
Encyclopedia
The Vividness of Visual Imagery Questionnaire (VVIQ) was published in 1973 by the British psychologist David Marks
David Marks (psychologist)
David F. Marks is a psychologist who is largely concerned with four areas of psychological research - health psychology, cognitive psychology, parapsychology and IQ score variations...

 (Marks, 1973). The VVIQ consists of 16 items in four groups of 4 items in which the participant is invited to consider the image formed in thinking about a specific scenes and situations. The vividness of the image is rated along a 5-point scale. The questionnaire has been widely used as a measure of individual differences in vividness of visual imagery. The large body of evidence confirms that the VVIQ is a valid and reliable psychometric measure of visual image vividness.

Marks' (1973) paper has been cited in more than 400 studies of mental imagery in a variety of fields including cognitive psychology
Cognitive psychology
Cognitive psychology is a subdiscipline of psychology exploring internal mental processes.It is the study of how people perceive, remember, think, speak, and solve problems.Cognitive psychology differs from previous psychological approaches in two key ways....

, clinical psychology
Clinical psychology
Clinical psychology is an integration of science, theory and clinical knowledge for the purpose of understanding, preventing, and relieving psychologically-based distress or dysfunction and to promote subjective well-being and personal development...

 and neuropsychology
Neuropsychology
Neuropsychology studies the structure and function of the brain related to specific psychological processes and behaviors. The term neuropsychology has been applied to lesion studies in humans and animals. It has also been applied to efforts to record electrical activity from individual cells in...

. The procedure can be carried out with eyes closed and/or with eyes open. The total score on the VVIQ is a predictor of the person's performance in a variety of cognitive, motor, and creative tasks. For example, Marks (1973) reported that high vividness scores correlate with the accuracy of recall of coloured photographs.

Marks (1995) published a new version of the VVIQ, the VVIQ2. This questionnaire consists of twice the number of items and reverses the rating scale so that higher scores reflect higher vividness. Rodway, Gillies and Schepman (2006) used a novel long-term change detection task to determine whether participants with low and high vividness scores on the VVIQ2 showed any performance differences. Rodway et al. (2006) found that high vividness participants were significantly more accurate at detecting salient changes to pictures compared to low vividness participants. This replicated an earlier study by Gur and Hilgard (1975).

Recent studies have found that individual differences in VVIQ scores can be used to predict changes in a person's brain while visualizing different activities. For example, Cui et al. (2007) used functional magnetic resonance imaging (fMRI) to study the association between early visual cortex activity relative to the whole brain while participants visualised themselves or another person bench pressing or stair climbing. The investigators found that reported image vividness correlates with the relative fMRI signal in visual corex. Thus individual differences in the vividness of visual imagery can be measured objectively. The subjective experience of forming a mental image and objective measurement of visual cortical activity show a strong and significant relationship.
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