The theory that suggests that memories are forgotten or lost spontaneously with the passage of time is referred to as:

During a classroom experiment, Jay found out that he could

sense a hair on his arm when it was barely touched with a pencil tip by Gerard. However, Jay had to wiggle a hair on Gerard's arm back and forth several times before Gerard could detect the sensation. The scientific explanation for this is that Jay and Gerard have different _____ thresholds. a) difference b) Weber's c) standard d) absolute

A child's brain reaches ______ of its adult size by about the age of 2

a. one-quarter c. three-quarters b. one half d. one third