Mental transformation of a constantly visible item and a memorized item

[Speaker] Okuzumi, Hideyuki:1
[Co-author] Oi, Yuhei:1, Saito, Ryotaro:1, Ikeda, Yoshifumi:2, Hirata, Shogo:3, Haishi, Koichi:4, Kokubun, Mitsuru:1, Oi, Mutsuko:1
1:Tokyo Gakugei University (Japan), 2:Joetsu University of Education (Japan), 3:Ibaraki Christian University (Japan), 4:Saitama University (Japan)

This study investigated mental transformation of a constantly visible item and a memorized item. Thirty-five university students (24 women; mean age 21.9 ± 1.1 years) were presented with a horizontal line 3, 6, 9, or 12 cm length and were asked to draw the same length line in the original direction or in a 90-deg rotated direction (in the latter case mental transformation was needed). The target line was kept visible until participants finished drawing the line. Alternatively, it was removed after 3-s presentation and participants were required to reproduce the line after a subsequent 3-s interval (in the latter case memorization was needed). Results show that accuracy was lower when the target line was no longer presented during drawing and when it was reproduced in a 90-deg rotated direction. The interaction was not significant, which suggests that a constantly visible item is manipulated similarly to a memorized item.
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