A large proportion of young adults are still living with their parents or relatives

Juan and Carlos are identical twins. Juan was raised by his father and mother, and Carlos was accidentally placed with another family after a "mix up" at the hospital

At the age of 15, both boys "ran into each other" at a football game and noticed how they appeared to be "mirror images of each other." After proving they were twins by genetic testing, the families discussed some of the differences between the boys. Juan is very athletic and intelligent and excels in basketball but does not take school seriously and has F's in all subjects. Carlos is also athletic and intelligent, and excels in baseball and makes straight A's as a result of his strict home life and study routine. Although they are identical twins, what do you think accounts for the differences in their academic performance based on the research? a. nurture b. nature c. school district superintendent d. teacher appraisals of performance e. continuity

After several terms of struggling academically, Justin worked very hard, buckled down, and brought home a report card with all A's. His father, immensely proud of Justin,

went out and bought him front row seats to the upcoming baseball game so that Justin and a friend could have a fun night as a reward. What kind of operant outcome did Justin's father provide for the brilliant report card? a. Positive reinforcement b. Negative reinforcement c. Material reinforcement d. Innate reinforcement