A cognitive psychologist speculated that left-handed people would have better me
ID: 3463858 • Letter: A
Question
A cognitive psychologist speculated that left-handed people would have better mental rotation ability than right-handed people, especially for difficult imagery tasks. He gave a group of 20 right-handed subjects and 20 left-handed subjects the classic mental rotation task, where subjects view a pair of images that differ in their rotation from one another and decide whether they are the same or different. Half the images can be rotated to become identical are the same; the other half is flipped images and can never be rotated to the same image. On 100 trials, the two images were rotated between 15 and 60 degrees (the easy condition) and on another 100 trials the images were rotated between 120 and 175 degrees (the hard condition). Each subjects received the 200 trials in a random order uniquely determined for that subject. The dependent variable was reaction time (RT) to decide if the images were the same or different.
Letting L and R stand for left and right handed, and E and D stand for easy and difficult, the mean reaction times (in msec) were as follows: LD 800, LE 700, RD 900, RE 800.
Was the psychologist’s hypothesis supported?
A cognitive psychologist speculated that left-handed people would have better mental rotation ability than right-handed people, especially for difficult imagery tasks. He gave a group of 20 right-handed subjects and 20 left-handed subjects the classic mental rotation task, where subjects view a pair of images that differ in their rotation from one another and decide whether they are the same or different. Half the images can be rotated to become identical are the same; the other half is flipped images and can never be rotated to the same image. On 100 trials, the two images were rotated between 15 and 60 degrees (the easy condition) and on another 100 trials the images were rotated between 120 and 175 degrees (the hard condition). Each subjects received the 200 trials in a random order uniquely determined for that subject. The dependent variable was reaction time (RT) to decide if the images were the same or different.
Letting L and R stand for left and right handed, and E and D stand for easy and difficult, the mean reaction times (in msec) were as follows: LD 800, LE 700, RD 900, RE 800.
Was the psychologist’s hypothesis supported?
Explanation / Answer
The result of the study shows that the reaction time of left handed people for difficult and easy both task is less than the right handed people. It means, left handed people have better ability of mental rotation than right handed people. Therefore the hypothesis of the psychologists supports the study.
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