Which of these is a mnemonic device?

What is the first visible sign of puberty?

a. facial and body hair b. acne c. primary sex characteristics d. adolescent growth spurt

Armando was playing the piano when his sister asked him how to spell "corpus callosum." He was able to think through the complicated spelling, but while he spelled the word out for his sister, he momentarily stopped playing the piano. This sugge

A) Armando does not enjoy playing the piano B) piano playing has become an automatic process C) Armando may have an attentional disorder D) piano playing is still an effortful process requiring conscious attention E) spelling has become an automatic process