Accordingly to Thomas and Chess, which dimension of temperament reflects the amount of friendly, joyful behavior as opposed to unpleasant, unfriendly behavior?

Fetal movements observed in 3-D ultrasound images ________

a. have been random and unsystematic b. are signs that the brain is becoming organized but have little significance for physical growth c. are only made in response to loud sounds made outside the womb d. resemble many complex movements made by newborn babies, such as sucking, swallowing, and yawning

In signal detection theory, which of the following would be affected by increasing the strength of the target relative to the noise?

a. ? b. ? c. d? d. r