Emir is using discrete-trial teaching to teach his client matching-to-sample tasks. He delivers a favorite snack after an average of ten correct responses. Based on this program type, how should Emir assess his client’s preferences?

The volume occupied by 1.5 mol of gas at 35 °C and 2.0 atm pressure is ________ L.

How much faster does 79Br2 effuse than 81Br2?

Leanne oversees a group of high schoolers serving as counselors at a summer camp. One counselor typically avoids setting up the craft stations at the beginning of the day but often helps with other setup tasks. Leanne asks the counselor to help set up the music and exercise stations before asking her to set up the craft stations. Which of the following teaching strategies is Leanne using with the counselor?

Von, a behavior analyst, is working on increasing Jerrod’s vocal repertoire. Von takes Jerrod to a highly preferred therapy room containing several of Jerrod’s preferred items, including several toy trucks. Von follows Jerrod around the room. When Jerrod sits down next to the toy trucks and begins sorting them, Von sets some trucks aside. When Jerrod reaches for the toy truck that Von had set aside, Von models the sound by saying, “Tuh,” and Jerrod repeats the sound saying, “Tuh.” Von gives the toy truck to Jerrod and continues to contrive echoics in the therapy room depending on what Jerrod is most interested in playing with. Which of the following teaching strategies is Von using with Jerrod?

What is the main factor that might cause a ball to curve during a putt?

Martha can brush her teeth on her own, but she often forgets to floss afterward. To increase the likelihood that she flosses, her mom places a flosser right next to Martha as soon as she finishes brushing her teeth. Each day, her mom gradually moves the flosser closer to its original spot in the drawer. Over time, Martha begins flossing on her own, even when the flosser is no longer placed near her. Which of the following is Martha’s mom using to evoke flossing?

Lucy is teaching her client, Oscar, to wash his hands. During the first few trials, Lucy uses hand-over-hand prompting. For next trial, Lucy fades her prompts to Oscar’s wrist. For the following trial, Lucy prompts at the client’s elbows. On the final trial, Oscar washes his hands without prompting. Which of the following strategies is this progression an example of?

Patrice, a behavior analyst, presents a number of items to her client Jane one at a time and records whether Jane approaches each item. She allows an opportunity for Jane to reach for and engage with the item before presenting the next item to Jane. If Jane does not reach for the item in front of her within a certain period, Patrice removes it and presents another item. What type of preference assessment method is Patrice using?

Two siblings inherit the same autosomal dominant mutation. One has mild symptoms, while the other has severe disability. What genetic concept explains this variability?