Extra Practice for graphing and interpreting. Workbook pages around ? (ANSWERS BELOW)

Transcription

1 Extra Practice for graphing and interpreting. Workbook pages around ? (ANSWERS BELOW) (1) #8 from assignment 1. The general relationship between performance and arousal level is described by the Yerkes-Dodson law. This law states that performance is best at a moderate level of arousal. When arousal is too low, people do not care about what they are doing, and performance is poor. At the other extreme, when arousal is too high, people become overly anxious, and performance suffers. In addition, the exact form of the relationship between arousal and performance depends on the difficulty of the task. To test the Yerkes-Dodson law, a researcher manipulated both task difficulty and arousal level while measuring the number of problems correctly solved in 2 minutes. They found that the easy task with low arousal had a mean of 8 (st dev = 12.2), the difficult task with low arousal had a mean of 6 (st dev = 1.8), the easy task with high arousal had a mean of 12 (st dev = 18.4), and the difficult task with high arousal had a mean of 8 (st dev = 13.3). Graph the cell means, interpret the graph using technical terms learned in class. Make sure to state the results you think will be significant based on the graph and then put the trend into real words (that means interpret). (2) A researcher did an experiment investigating the effectiveness of computer-assisted instruction on enhancing first-grader s reading level. Half of the students received reading instruction using the new game-style instruction on the computer while half received the standard method not on the computer. He thought that any enhancement effects may differ dependent upon the student s gender so he separately randomize a set of first grade girls to the two different conditions and a group of boys two conditions. Here are the cell means for the learning task. Graph the cell means, interpret the graph using technical terms learned in class. Make sure to state the results you think will be significant based on the graph and then put the trend into real words (that means interpret). Reading instruction method Gender Computer Standard Boys 33 2 Girls 42 39

2 number correct Number of phobic reactions Extra Practice for Final. For the following state in formal terms whether there is a possible effect and then interpret: (3) Type of counseling and drug therapy for phobias Inoculation Exposure Supportive counseling Waiting list Drug No Drug Type of counseling (4) Type of practice and type of material for number correct Statistics Flash cards Elaboration No Practice Type of practice Foreign language Psychology

3 Number of problems solved ANSWERS: Graph the data then interpret the graph using technical terms learned in class. Make sure to state the results you think will be significant based on the graph and then put the trend into real words. task difficulty Arousal level Low high easy difficult There is probably a main effect of arousal level on the number of problems solved. There were more problems solved in the high arousal condition than the low arousal condition. There is probably a main effect of task difficulty on the number of problems solved. Easy problems were solved more frequently than difficult problems. There is probably an interaction of arousal level X task difficulty on the number of problems solved. The difference between easy and difficult problems was greater for high arousal level than for low arousal level Low Task difficulty high easy difficult

4 Number of problems solved Reading instruction method Computer Standard boys gender girls There is probably a main effect of reading instruction method on the (reading) learning task. Students using the computer got more correct than those using the standard method. There is probably a main effect of gender on the (reading) learning task. Girls answered more correct responses than boys. There is probably an interaction of arousal level X task difficulty on the number of problems solved. The difference between two methods was greater for boys than for girls boys Computer Standard girls Task difficulty

5 (3) Inoculation Exposure Supportive counseling Waiting list Drug No Drug There is probably a main effect of Type of counseling on the number of phobic reactions. Inoculation lead to the least number of phobic reacation followed by Exposure, Supportive counseling, and finally the Waiting list There is probably a main effect of Type of drug therapy on the number of phobic reactions. Having No drug lead to less phobic reacation than Drug There is probably no interaction of Type of counseling X Type of drug on the number of phobic reactions. Having no drug leads to 4 less phobic reacation for each Type of counseling (4) Flash cards Elaboration No Practice Statistics Foreign language Psychology There is probably is not a main effect of Type of Practice on the number correct (Although if there is very little variablity maybe it would be significant but probably not) Regarless of the type of practice, people don't recall many items. There is probably a main effect of Type of material on the number correct People learned statistics the best followed by foreign lang which was better than psychology There is probably an interaction of Type of Practice X Type of Material on the number correct For statistics, flash cards lead to better learning followed by elaboration followed by no practice. For psychology, no practice lead to better learning followed by elaboration followed by Flash cards For foreign lang, the type of material didn t seem to matter