Operational Definitions Science requires observation of variables Some vari

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Operational Definitions Science requires observation of variables Some vari

Drexel University, US has reference to this Academic Journal, Operational Definitions Science requires observation of variables Some variables are easy so that observe or measure. Height Weight But most variables that we are interested in psychology are more abstract. Known as hypothetical constructs Hypothetical constructs Even concepts that might seem pretty straight forward can be tricky Mother Hunger And some are even more abstract Intelligence Love Operational definitions Psychologists often want so that measure hypothetical constructs To do so we must create measurement rules in consideration of those variables Known as operational definitions Must be easily observed Typically involving a behavior Remember psychology is the science of human behavior

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Operationally defining variables in consideration of the content analysis For your content analysis you will need an operational definition in consideration of your predictor variable. Many of the articles I gave you so that read used gender as a predictor variable. How would you operationally define Gender? Category checked on a survey Gender category used as identifier on online dating site Physical attributes Operationally defining variables in consideration of the content analysis Must be mutually exclusive One or the other (male or female) Pretty straight forward Operationally defining variables in consideration of the content analysis You will also need so that operationally define the criterion variable. This is often more difficult. Gender differences in mate selection. How would you determine? Seeking Success attributes Seeking Physical attributes Remember ? must be mutually exclusive categories in consideration of our content analysis.

Could keep track if ad ?mentioned? several traits. From Davis article Attractive ? specified partner should be, in consideration of example, pretty or handsome Physique ?define Interested in sex ? define Asked in consideration of picture – define Financial – define Education – define Intelligence – define Profession ? define Rules 1 point if mentioned No multiple counts If more physical traits mentioned than success categorized as physical No ties (throw out if occurs)

A High Sensitivity Interferometer-Based Spectrometer Without a Fourier Transform Contents Contents Motivation Applications of coherence-based approaches Example 1: A helicopter infra red emission spectrum Example 2: Deoxyhaemoglobin absorption spectra Example 3: Forensic science (spectrum of Diazepam ? ?Valium?) Example 4: Detection of plastic explosives (with THz radiation) (spectrum of pentaerythritol tetranitrate ? PETN) Contents FTS Interferogram Phase Step Shift (IPSS) IPSS – Interferogram shaping The detected signal Phase step shift Contents IPSS vs. FTS COMPARISON FURTHER PERFORMANCE DATA IPSS vs. FTS COMPARISON Contents Basic experimental system Results: He-Ne laser Targets detected MDSCR vs. target coherence length Contents Algorithm waveforms Contents Conclusions ACKNOWLEDGEMENTS

Clark, Carol Meteorologist

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