Samantha wants to conduct an experiment to see whether or not pets can reduce physiological stress...

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Samantha wants to conduct an experiment to see whether or not pets can reduce physiological stress (measured via heart rate and blood pressure) compared to a (human) friend. She is trying to decide (a) how to divide participants into conditions and (b) what the experimental manipulation should be. Past studies have shown that being asked to give a speech in the lab is a very effective way of inducing stress. Below is her current plan: (a) Dividing participants: before the study, ask participants if they have a pet; if they have a pet, they get the 'Pet' condition; if they do not have a pet, they get the 'Friend' condition. (b) Experimental manipulation: in the 'Pet' condition, participants are asked to give a speech while their pet is present in the room. In the 'Friend' condition, participants are asked to have a conversation with their friend before arriving at the lab and then give a speech with no one else in the room. For each aspect of Samantha's plan (dividing participants and the experimental manipulation), indicate yes/no of whether that is a good plan and explain why her decision satisfies or fails to satisfy the requirements for a true experiment. You should have two sets of yes/no + why responses (one for dividing participants and one for experimental manipulation). Samantha wants to conduct an experiment to see whether or not pets can reduce physiological stress (measured via heart rate and blood pressure) compared to a (human) friend. She is trying to decide (a) how to divide participants into conditions and (b) what the experimental manipulation should be. Past studies have shown that being asked to give a speech in the lab is a very effective way of inducing stress. Below is her current plan: (a) Dividing participants: before the study, ask participants if they have a pet; if they have a pet, they get the 'Pet' condition; if they do not have a pet, they get the 'Friend' condition. (b) Experimental manipulation: in the 'Pet' condition, participants are asked to give a speech while their pet is present in the room. In the 'Friend' condition, participants are asked to have a conversation with their friend before arriving at the lab and then give a speech with no one else in the room. For each aspect of Samantha's plan (dividing participants and the experimental manipulation), indicate yes/no of whether that is a good plan and explain why her decision satisfies or fails to satisfy the requirements for a true experiment. You should have two sets of yes/no + why responses (one for dividing participants and one for experimental manipulation).