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Fun With Experiments: Lab vs Field, and Cool Natural and Quasi Ones!

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Iulia Ghenciu

31/10/2022

Psychology

Types of Experiment

Fun With Experiments: Lab vs Field, and Cool Natural and Quasi Ones!

Laboratory and field experiments are compared, highlighting their advantages and disadvantages. The document also explores natural experiments with higher external validity and quasi-experiments with naturally occurring independent variables, providing insights into different experimental methodologies in psychology.

  • Laboratory experiments offer high control and internal validity but lack external validity.
  • Field experiments provide greater ecological validity but have less control over variables.
  • Natural experiments examine real-life events but are limited by their rarity.
  • Quasi-experiments study existing differences between people but may lack generalizability.
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31/10/2022

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Psychology

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31 Oct 2022

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Fun With Experiments: Lab vs Field, and Cool Natural and Quasi Ones!

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Iulia Ghenciu

@iuliaghenciu

Laboratory and field experiments are compared, highlighting their advantages and disadvantages. The document also explores natural experiments with higher external validity and quasi-experiments with naturally occurring independent variables, providing insights into different experimental methodologies in psychology.

  • Laboratory experiments... Show more

Laboratory experiment
Field experiment
Laboratory experiment are conducted under specific controlled conditions in Field experiments are car

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Types of Experiments in Psychology

This page provides an overview of four different types of experiments used in psychological research: laboratory experiments, field experiments, natural experiments, and quasi-experiments. Each type is described with its key characteristics, advantages, and disadvantages.

Laboratory Experiments

Laboratory experiments are conducted under controlled conditions where the researcher manipulates the independent variable IVIV to measure its effect on the dependent variable DVDV. Participants are brought to the researcher's controlled environment.

Highlight: Laboratory experiments offer a high degree of control over extraneous variables, allowing for strong conclusions about cause and effect.

Advantages:

  • High control over extraneous variables
  • Strong internal validity
  • Easy replication

Disadvantages:

  • Lack of external and ecological validity
  • Limited generalizability
  • Presence of demand characteristics

Field Experiments

Field experiments take place in natural settings, where the researcher still manipulates the IV to measure its effect on the DV. Participants typically don't know they're part of a study.

Highlight: Field experiments provide greater ecological validity and external validity compared to laboratory experiments.

Advantages:

  • Higher ecological validity
  • Greater external validity

Disadvantages:

  • Less control over extraneous variables
  • Ethical concerns due to lack of informed consent

Natural Experiments

In natural experiments, researchers examine the effect of a naturally occurring IV on the DV without manipulation. These events could be natural disasters or other significant occurrences.

Definition: Natural experiments involve studying the effects of naturally occurring events on human behavior, comparing affected individuals to their pre-event behavior or to a control group.

Advantages:

  • High external and ecological validity
  • Unique insights into real-life situations

Disadvantages:

  • Limited opportunities due to the rarity of natural events
  • Reduced ability to generalize results

Quasi-Experiments

Quasi-experiments involve studying the effects of naturally occurring IVs that already exist, such as gender, age, or personality traits. These can be conducted in various settings.

Example: A researcher might study the effect of age IVIV on memory recall DVDV without manipulating the age variable.

Advantages:

  • High control when conducted in laboratory settings
  • Possibility of replication

Disadvantages:

  • Lack of ecological validity in laboratory settings
  • Limited generalizability
  • Presence of participant variables due to non-random allocation

Vocabulary: Independent Variable IVIV - The factor manipulated or observed by the researcher. Dependent Variable DVDV - The outcome measured in response to changes in the IV.

This comprehensive overview of experimental types in psychology highlights the advantages and disadvantages of comparing laboratory and field experiments, emphasizes how natural experiments provide higher external validity and insights into real-life situations, and explains quasi-experiments with their naturally occurring independent variables.

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Greenlight Bonnie

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very reliable app to help and grow your ideas of Maths, English and other related topics in your works. please use this app if your struggling in areas, this app is key for that. wish I'd of done a review before. and it's also free so don't worry about that.

Rohan U

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Elisha

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This apps acc the goat. I find revision so boring but this app makes it so easy to organize it all and then you can ask the freeeee ai to test yourself so good and you can easily upload your own stuff. highly recommend as someone taking mocks now

Paul T

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