Frank has been asked to complete Piaget's pendulum problem. He comes up with some hypotheses and then systematically tests each variable
First, he holds the length of the string and the amount of weight constant and varies the height at which oscillation is started then he moves on to examining the other variables. Frank is in which stage of Piaget's cognitive developmental theory?
A) sensorimotor stage
B) preoperations
C) concrete operations
D) formal operations
D) formal operations Adolescents using formal operations, however, start by considering all of the variables and all of their possible combinations, reasoning that any single factor could be responsible for the pendulum's rate of swing. They then systematically test each factor one at a time, holding the other factors constant, until they arrive at the correct solution.
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Which research result would provide evidence that aggression is a heritable trait? a. Identical twins reared together are more similar in their levels of aggressiveness than identical twins rearedapart
b. Adopted children are more similar in levels of aggressiveness to their adoptive parents than to their biologicalparents. c. Fraternal twins are more similar in levels of aggressiveness than non-twin siblings. d. Identical twins are more similar in levels of aggressiveness than fraternal twins.
Sildenafil (Viagra) works by ____
a. increasing sensitivity to female's pheromones b. increasing release of nitric oxide in the hypothalamus and penis c. decreasing dopamine release in the hypothalamus d. blocking pain receptors in the spinal cord