Mendoza and colleagues (2009) introduced a coin-rotation task as a convenient test of motor dexterity. It involves timed completion of twenty 180° rotations of a nickel using the thumb as well as the index and middle fingers. Researchers compared the results of this test with the results of another widely used test of motor dexterity, the finger-tapping task, in which participants tap their index fingers as many times as possible in 10 seconds. The results indicate that there was a statistically significant relationship between the finger-tapping task and the coin-rotation task (r = −.30).
Question
Mendoza and colleagues (2009) introduced a coin-rotation task as a convenient test of motor dexterity. It involves timed completion of twenty 180° rotations of a nickel using the thumb as well as the index and middle fingers. Researchers compared the results of this test with the results of another widely used test of motor dexterity, the finger-tapping task, in which participants tap their index fingers as many times as possible in 10 seconds. The results indicate that there was a statistically significant relationship between the finger-tapping task and the coin-rotation task (r = −.30).
Solution
Mendoza y sus colegas (2009) introdujeron una tarea de rotación de monedas como una prueba conveniente de destreza motora. Implica la finalización cronometrada de veinte rotaciones de 180° de un níquel utilizando el pulgar, así como los dedos índice y medio. Los investigadores compararon los resultados de esta prueba con los resultados de otra prueba ampliamente utilizada de destreza motora, la tarea de golpeteo con el dedo, en la que los participantes golpean sus dedos índice tantas veces como sea posible en 10 segundos. Los resultados indican que había una relación estadísticamente significativa entre la tarea de golpeteo con el dedo y la tarea de rotación de monedas (r = −.30).
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