experimental method

• aim?


  general statement of what the researcher intends to investigate, the purpose of the study
• hypothesis? 


  clear precise testable statement that states the relationship between two variables being investigated.
• directional hypothesis? 


  states the direction of the difference or relationship
• non directional hypothesis? 


  does not state the direction of the difference or relationship
• experimental method? 


  involves manipulation of the independent variable to measure the effect on the dependent variable. experiments may be lab, field, natural or quasi.
• independent variable? 


  some aspect of the experimental situation that is manipulated by the researcher or changes naturally so that the effect on the DV can be measured
• dependent variable? 


  variable that is measured by the researcher. any effect on the DV should be caused by the change in IV.