Experiments (20) Flashcards
Experiments Definition
Giddens: Experiments “can be defined as an attempt within artificial conditions established by an investigator to test the influence of one or more variables upon others”
What happens in Experiments?
Hypothesises tested. Variables are controlled and manipulated. Causal relationships investigated. Quantitative Data produced.
What are the two types of Experiment?
Laboratory and Field
Laboratory Experiments
Conducted in controlled and artificial environments where very precise evidence is collected consistently. Independent variables may be influencing the dependent variable they are studying and is the presumed cause of the dependent variables is the presumed effect.
Field Experiments
Conducted in everyday normal environments. The research was undertaken in the social world and isolating certain variables so the hypothesis is tested. There is inherently less control over variables and can be affected by extraneous variables.
R1) General Reliability of Experiments
Can be repeated time and time again, so generally, experiments, therefore, are regarded as being highly relaibile.
R2) Why are they reliable
Controlled environments and standardised procedure allow for the exact conditions of the research to be repeated so results can be tested and verified.
The original experimenter can specify precisely what steps were followed in the original study so it can be repeated exactly.
It gathers objective quantitative data.
It’s a highly detached method of research as researchers merely manipulate variables and record results. Feelings and Opinions cannot influence or alter any outcome.
R3) Milgram as an Example
Conducted various variations of his original obedience to authority experiment in 1961. 65% obeyed Authority Figures. It was conducted on 40 American men with a standardised procedure. As well as in different environments like a rundown office block which is a more realistic environment.
R4) Burger as an Example
Concluded after conducting a replication of Milgram study (ethical adjustments) that his results still held true half a century later. 70% went past 150v. Not a statical difference from Milgram.
Representativeness of Experiments
Hard to find a representative sample that reflects the population in mind. As different ages, genders and ethnicities and cultures would be needed to represent the whole population. Experiments usually use small groups, that might be biased which limits the claims that can be made and any conclusions drawn from the results.
Representativeness Example (Rosenhan)
Rosenhan: 12 different hospitals, across five states, various degrees of staff to patients, funded and under-funded. But still small. Few bad apples can have affected the results. So his bold conclusion that you can’t distinguish the sane from the insane may not be accurate or apply to everyone.
Experiments are Highly Valid
Lab Experiments, in particular, have high control of variables and the reduction or complete removal of EVs in experiments mean cause and effect relationships can be established. Which allows for the precise measure of the effect one variable has on another. As accurate conclusions can be drawn.
Experiments are no Valid
Labs are unnatural environments so there is low ecological validity due to artificial conditions. Behaviour won’t be natural so you cannot tell us anything about how people react in real life so not the true picture of behavior
Field Experiments and Validity
Have higher external validity as conducted in real life setting but there is limited control over EVs. However it is impossible to replicte things like weather and all the other factors that influence people’s behaviour.
Validity Example (Bandura)
Bandura: Investigating the effects of media violence on the children watching it and showed that the media does have an effect. However, children were put in a strange situation exposed to unusual adult behaviour. Toys thats encouraged unnatural behaviour, bobo doll. Demand Characteristics.