experiment

• what is a laboratory experiment?


  A controlled scientific procedure conducted in a controlled environment to test a hypothesis.
• what is a strength of laboratory experiment?


  controlled environment and control of any extraneous variables that could take place, easy to replicate due to the standardised procedure
• what is a weakness of laboratory experiment?

  low ecological validity because they are conducted in an artificial study that does not reflect real-life.
• what is a field experiment?

  An experiment conducted in a real-world setting, outside of a laboratory.
• what is a strength of field experiment?

  high ecological validity due to the natural setting

  less chance of demand characteristics
• what is a weakness of a field experiment?

  less control over extraneous/cofounding variables

  difficult to replicate the research meaning less reliable
• what is a quasi experiment?

  a naturally occurring independent variable that already exists between people, such as gender or age.

  • studies that look for casual effects without random assignment of participants to groups.
• strengths of a quasi experiment

  higher external validity - more real world applications

  more targeted, controlled and efficient
• weakness of quasi experiment?

  lower internal validity - due to the researchers controlling the variables, hard to know if they have included all cofounding variables

  time-consuming - many sets of hypothesis that may make it harder to investigate

  risk of inaccurate data - often borrows data