In one study

Question

31. Brain surgery is sometimes conducted under local anesthesia while the patient remains awake. During such surgery, suppose the surgeon lightly stimulates a few neurons in the patient's left parietal cortex (in the post-central gyrus). What will the patient probably experience? 
a. touch sensation somewhere in the right half of the body 
b. visual sensation somewhere in the left visual field 
c. auditory sensation coming from the right side of the world 
d. movements of the left side of the body 

32. An experiment was conducted to test the effect of rewards on learning. One group of subjects was paid 10 cents for every word they memorized and the other group was not paid. Number of words memorized was measured. Which of the following is true? 
a. number of words memorized is the dependent variable 
b. payment or not is the dependent variable 
c. random assignment should ensure that the groups differ in the beginning 
d. number of words memorized is the independent variable 

33. In one study, the experimental group is subjected to loud, unpredictable noises to see whether or not those noises will affect performance on a memory task. What will the control group do? 
a. nothing at all 
b. perform the memory task without noises 
c. listen to the noises but perform no task 
d. control the noises that the experimental group has to listen to 

34.The standard deviation is a statistic that measures 
a. the average score 
b. the difference between two groups 
c. mistakes made by the experimenter 
d. the variability of scores 

Answer 1

I can help you with a few of these:

31. Would be A. touch sensation somewhere in the right half of the body

This is because when our primary somatosensory cortex processes sensory information on the left hemisphere it is coming from the right side of the body and vice versa.

Left Hemisphere = Right side of the body

Right Hemisphere = Left side of the body

32. Would be A. number of words memorized is the dependant variable

A dependent variable is the measured outcome of the changes due to said manipulation(independent variable). Our independent variable is whether the subjects of the experiment were paid or not, making the number of words memorized our dependent variable.

33. Would be B. perform the memory task without noises

When conducting an experiment the control group is used as our baseline to compare against our experimental group, this will determine the effect of our independent variable. Our subjects in the control group will conduct the same experiment without the loud noises (independent variable) to be able to isolate the effect and get a more accurate result.

34. Would be D. the variability of scores

The standard deviation is a form of measurement used to quantify the amount of variation or dispersion in a set of values. Basically, we are measuring how spread out the numbers are in our given data set. This will allow us to compare the individual numbers in our data set to our average (mean).