Testing the Effectiveness of a New Cough Medicine
ANSWERS to EXPERIMENTAL METHOD PRACTICE WORKSHEET
This is a reply to a student’s attempt so you can see errors in thinking as well as see the correct answer.
Good job. But a few technical matters need to be cleared up. Items are correct unless explanatory response appears in blue.
An experiment tests the effectiveness of a new cough medicine by giving one group of subjects the new medicine and giving another group of subjects the old brand of cough medicine.
Ho (hypothesis)- The effectiveness of a new cough medicine is better than that of an old medicine.
IV –New cough medicine IV is a variable so it ust be stated in terms that show how it varies. New medicine is only half. A more accurate description would be “brand” or “amount” of medicine. Remember definition of IV is a variable that the Experimenter changes in a systematic way.
DV - Effectiveness
Exp grp –subjects given new medicine
Control grp- subjects given old medicine
1. A researcher predicts that children who have just watched an aggression-filled film will play more aggressively compared to children who have just watched an exciting but non-aggressive film.
Ho (hypothesis)-Children who have watched an aggressive-filled film will play more aggressively than children who have watched an exciting but non-aggressive film
IV –The aggressive filled film Type of film; level of aggression in film; content of film. The systematically changed “variations” are aggressive-filled and non-aggressive films.
DV- The children who watched the aggressive film will play more aggressively DV is a variable, not a group (“children”); level of aggression in play is what is “measured” which is definition of DV
Exp grp –The children who have just watched a aggressive film
Control grp-The children who watched a exciting non-aggressive film compared to the ones who watched a aggressive film.
2. 3. Some patients in a nursing home drink orange juice before watching an informative film. Other patients drink
This is a reply to a student’s attempt so you can see errors in thinking as well as see the correct answer.
Good job. But a few technical matters need to be cleared up. Items are correct unless explanatory response appears in blue.
An experiment tests the effectiveness of a new cough medicine by giving one group of subjects the new medicine and giving another group of subjects the old brand of cough medicine.
Ho (hypothesis)- The effectiveness of a new cough medicine is better than that of an old medicine.
IV –New cough medicine IV is a variable so it ust be stated in terms that show how it varies. New medicine is only half. A more accurate description would be “brand” or “amount” of medicine. Remember definition of IV is a variable that the Experimenter changes in a systematic way.
DV - Effectiveness
Exp grp –subjects given new medicine
Control grp- subjects given old medicine
1. A researcher predicts that children who have just watched an aggression-filled film will play more aggressively compared to children who have just watched an exciting but non-aggressive film.
Ho (hypothesis)-Children who have watched an aggressive-filled film will play more aggressively than children who have watched an exciting but non-aggressive film
IV –The aggressive filled film Type of film; level of aggression in film; content of film. The systematically changed “variations” are aggressive-filled and non-aggressive films.
DV- The children who watched the aggressive film will play more aggressively DV is a variable, not a group (“children”); level of aggression in play is what is “measured” which is definition of DV
Exp grp –The children who have just watched a aggressive film
Control grp-The children who watched a exciting non-aggressive film compared to the ones who watched a aggressive film.
2. 3. Some patients in a nursing home drink orange juice before watching an informative film. Other patients drink