Which of the following is an example of a fixed ratio schedule of partial reinforcement? a. Hoping to catch a message from her boyfriend, Wendy checks her e-mail again and again throughout the day. b. Jaime has a paper due once a month in his sociology course. His productivity is low at the beginning of the month and high as the deadline approaches. c. Sam earns extra money by driving a shuttle bus from the airport to the hotel. He is paid $20 per trip, but Uber drivers and taxis sometimes pick up all the passengers going to the same hotel and Sam has to wait for the next flight to arrive. d. In hopes of winning a big jackpot, Penny plays the slot machines at a nearby casino.

"harry t. moore (1905-1951) – civil rights activist, leader, and the first martyr of the civil rights movement. fannie lou hamer (1917–1977) – leader in the american civil rights movement; co-founder of the national women's political caucus and freedom democratic party. james farmer (1920–1999) – congress of racial equality."

answer; scientific;

answer; internal; covert processes;

i believe the answer is: true

our brain need to reach a certain level of development   before it could interpret and understood sound with high difficulties. to proof this, we just need to pay attention in musical preference between children and adults. it is far less likely that children would enjoy things such as orchestra or rock band as much as adults due to the difference in this ability.