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Resourcd File Resourcd File Document Transcript

  • Key Terms GCSE Psychology Research Methods Revision The variable that the researcher alters or manipulates to look for an effect. Protection from harm Confidentiality Privacy Right to withdraw Informed consent Deception Two (or more) groups of participants, one for each condition. A procedure where the order in which participants complete conditions, is evened out. A method of research in which all variables, other than the IV and DV are controlled. To establish cause & effect. The variable that the researcher measures. When the results of an experiment can be applied to real life. Variables which aren’t the IV but may affect the DV if they are not controlled. One group of participants who take part in both conditions. The large group of people the research wants to study and chooses the sample from. A testable statement of what the researcher expects to happen. Occurs in a repeated measures design, when the participants’ performance in the second condition might be affected because they have already completed the first one.
  • Experimental Design GCSE Psychology Research Methods Revision Look at each of the pictures. Which experimental design do they show? Condition A Condition B Which Experimental Design? Condition A Condition B Which Experimental Design? Condition A Condition B Which Experimental Design?
  • Experimental Advantages & Disadvantages GCSE Psychology Research Methods Revision Match the advantages and disadvantages to the appropriate experimental design. Repeated Groups Independent Groups Matched Groups Mr Good has a positive outlook on life and sees advantages in everything. Mr Worry is always worrying about the potential issues, disadvantages. There are no order effects because participants only take part in one condition. There are order effects as participants do two tasks. Participant variables are reduced. You need to recruit less participants. There are different people in each condition so participant variables might affect the results. Matching participants is difficult and time consuming. View slide
  • Types of Experiment Advantages & Disadvantages GCSE Psychology Research Methods Revision Match the advantages and disadvantages to the appropriate experimental design. Lab Experiment Natural Experiment Mr Good has a positive outlook on life and sees advantages in everything. Mr Worry is always worrying about the potential issues, disadvantages. Easier to control extraneous variables and establish cause and effect Harder to control extraneous variables and establish cause and effect. Easily replicated by other researchers High Ecological Validity Participants are aware they are taking part in an experiment and are likely to change their behaviour as a result. Artificial. Low Ecological validity. View slide
  • Sampling Methods GCSE Psychology Research Methods Revision Using two colours to represent two different groups… draw a picture to show each type of sampling method. Sampling Method Picture Advantages & Disadvantages Random Sample Every member of the target population has an equal chance of being picked. E.g. pulling names out of a hat.  No Researcher Bias  Representative of target population  Time consuming Opportunity Sample Those who are willing and available to take part.  Quick & Easy  Not likely to be representative – sample bias. Stratified Sample Identifying subgroups from a target population and using the same proportions to make the sample.  Very representative  Time consuming Systematic Sample Using a system. E.g. picking every nth person from a list.  No Researcher Bias  Not representative
  • Data Analysis GCSE Psychology Research Methods Revision Averages Calculate the Mean, Median, Mode & Range for this set of data: Data 4 2 7 7 9 7 3 5 8 9 3 Mean: Median: Mode: Range: Which of these sets of data has the highest mean? A 25 7 11 19 30 B 16 13 21 20 25 Graphs What does this graph show?