web experiments

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    07-Jan-2017
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Transcript of web experiments

  • () Online Experiments

    .. 1 http://abrailas.github.io

  • 2015 .. 2

  • 2015 .. , , http://vrlab.panteion.gr 3

  • 2015 .. 4

  • ,

    , (threats to internal validity)

    2015 .. 5

  • (true experiments)

    :

    Manipulation ( ) Comparison (

    ) Random assignment ( ).

    : randomized control trials- RCTs

    2015 .. 6

  • Manipulation

    ( -condition) . , . ( ) (, ).

    2015 .. 7

  • Comparison

    , ( ) . (maturation) (threat to internal validity).

    2015 .. 8

  • Randomization

    (-) ( ), .

    2015 .. 9

  • Manipulation Comparison - Randomization

    , .

    (replicability) .

    2015 .. 10

  • Factorial designs

    ().

    , reviews e-shop . , 1, 2, 3, 4, 5 . : ?

    2015 .. 11

  • , , . . ( ).

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  • main effect.

    interaction effect.

    .

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  • Incomplete factorial designs

    .

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    1 *

    1*

    2 *

    2 *

    3 *

    3 *

    4 *

    4 *

    5 *

    5 *

  • Between-subjects design

    ( ) (between factor).

    2015 .. 15

  • within-subjects design

    ( ) (within-subjects factor).

    within-subjects , ( )

    repeated measures design within-subjects design ( ).

    2015 .. 16

  • Ceteris Paribus ( ) .

    control variables.

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  • (internal validity) .

    (ecological validity) . .

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  • Qusi-experimetal designs

    , .

    , .

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  • Correlational designs

    ,

    .

    .

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  • Experimental realism

    , (construct validity) .

    , , .. .

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  • 2015 .. 22

  • Stress has a ripple effect, increasing the stress of those around you. Anxious emotions, such as fear, are physiologically contagious through pheromones, chemicals released in our sweat. When someone emits fear pheromones, the people who come into contact with that person show greater activation in brain areas corresponding to anxiety and fear (particularly the amygdala).20 (p. 44)

    2015 .. 23

    : Seppala, E. (2016). The Happiness Track. UK: Piatkus

  • Experiments have demonstrated that people can catch emotional states they observe in others over time frames ranging from seconds to weeks. When college freshmen are randomly assigned to live with mildly depressed roommates, they become increasingly depressed over a three-month period. Emotional contagion can even take place between strangers, after just ephemeral contact. When waiters are trained to provide service with a smile, their customers report feeling more satisfied, and they leave better tips. Peoples emotions and moods are affected by the emotional states of the people they interact with. Why and how does this happen?

    2015 .. 24

    : Christakis, N. A., & Fowler, J. H. (2011). Connected: The Surprising Power of Our Social Networks and How They Shape Our Lives -- How Your Friends Friends Friends Affect Everything You Feel, Think, and Do. USA: Little, Brown.

  • 2015 .. , , http://vrlab.panteion.gr 25

  • 2015 .. 26

    Slide Number 2Slide Number 3Slide Number 4 (true experiments)ManipulationComparisonRandomizationManipulation Comparison - RandomizationFactorial designsSlide Number 12Slide Number 13Incomplete factorial designsBetween-subjects designwithin-subjects design Qusi-experimetal designsCorrelational designsExperimental realism Slide Number 23Slide Number 24Slide Number 25Slide Number 26