{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

Psych Stats Measurement Handout

Psych Stats Measurement Handout - To put this variable onto...

Info icon This preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
Scales of Measurement Measurement . An orderly assignment of a numerical value to a characteristic. Scale of Measurement . Ordered set of possible numerical values that can be obtained by the measurement process. E.g., to measure height, we assign a number to the height of an individual through some systematic process. To do so, we use some scale of measurement, such as number of inches or centimeters. To measure I.Q., we might use a standardized test of I.Q., which we administer and give to people. Based on the number of questions a person got right, we assign an I.Q. value from, say 20 to 180. To measure dominance rank in a preschool, we might count the number of instances a child got his way with another child during free-play periods, and then order children from most to least on this measure. The scale would be a rank from 1 to n, where n is the number of children in the preschool. To measure sex, we might ask people whether they’re male or female.
Image of page 1
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: To put this variable onto a measurement scale, we then might arbitrarily assign 1 = female and 2 = male. Properties of Measurement Scales . Scales of measurement differ in their properties. Three properties of measurements scales are: Magnitude . A scale has magnitude when one instance of the attribute being measured can be judged to be greater, less than, or equal to another instance. E.g., measurement scales of height have magnitude. Equal intervals . Here, the magnitude of the attribute represented by a unit of measurement on the scale is the same regardless of where on the scale the unit falls. Absolute zero point . A value indicates that nothing at all of the attribute being measured exists. Types of Measurement Scales . Which properties a scale possesses determines the type of scale it is. __Magnitude Equal Intervals Absolute Zero Point_ Ratio Scale Yes Yes Yes Interval Scale Yes Yes No Ordinal Scale Yes No No Nominal Scale No No No...
View Full Document

{[ snackBarMessage ]}

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern