This study proposes a new measure of spatial ability based on the measure of the visualization factor. I assessed the reliability and the validity of the Measure of the Ability to Form Spatial Mental Imagery (MASMI). The test was designed consisting of an unfolded cube that the subjects had to mentally reassemble before replying to 23 questions related to the cube. Each question had 4 multiple choices, 2 true and 2 false, the total score being the sum of all the correct answers and then subtracting the wrong responses. The sample consisted of 138 undergraduate psychology students, with a mean age of 20.1 years. I obtained a Cronbach's a of .93. The MASMI was correlated to different imagery measures-i.e., imagery questionnaires and spatial tests. The results reveal that the new test provides a good measure for the assessment of imagery ability. Fresh lines of research are proposed in relation to these tests.

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Sheehan's shortened form of Betts' Questionnaire Upon Mental Imagery is one of the most widely used inventories for measuring imaging. Participants were 562 undergraduate students (414 women and 148 men), with a mean age of 20.2 yr. In a principal components analysis followed by varimax orthogonal rotation for the Spanish version, eight factors were identified, six of which coincide with those of the original English version. Internal consistency was .92 (Cronbach alpha). Scores on the Betts Questionnaire Upon Mental Imagery correlated -.34 with those on the Gordon Test of Visual Imagery Control, .58 with those on the Vividness of Visual Imagery Questionnaire, and .02 with the Verbalizer-Visualizer Questionnaire.

In this study, reliability and construct validity of the Vividness of Visual Imagery Questionnaire (VVIQ) and of a revised version, the Vividness of Visual Imagery Questionnaire-2 (VVIQ-2) were assessed with a total of 279 undergraduate psychology students who were also administered other measures of imagery. Cronbach a reliabilities for both the VVIQ and the VVIQ-2 were high. A Pearson correlation between scores on the two versions of the questionnaire was high and similar to correlations with other measures of imagery. Estimates of internal consistency reliability and construct validity were similar for the two versions. New lines of research involving both imagery questionnaires are proposed.