Task 1

Lab-Studies and surveys are both ways to measure observable variables empirically. In lab-studies, participants complete simulated work tasks in a controlled environment, while being observed. One example would be to invite participants into a lab where they have to complete search tasks on a computer, in which they have to find the names of songs they remember. Surveys are sets of well defined questions targeted at a specific group of people. One example would be a survey in which participants have to answer questions about their experience with a search engine they had, when trying to look for an old song they remember.

Task 2

One way of validation answers to questions in a survey would be to simply ask the same question twice, with different questions in between and formulated in a different way. Another good way of doing this is by checking the internal validity of the questions. This is done by checking if items in a multi-item scale are measuring the same thing.

Task 3

Lab studies provide a lot of control

Task 4

Task 4 A

  • H1: People who are high in character trait openness make more search queries than the average user.
  • H0: People who are high in character trait openness donโ€™t make more or even less search queries than the average user.

Task 4 B

Description: For an assignment you have to write a short essay on Jack Dorsey, the founder of Twitter. You can focus on anything in his live you want to, but it has to be understandable by anyone, even people who never heard his name. Write a short text of 400-500 words using information you found on the internet.

Task 5

The problem is that it is not free of bias (systematic measurement errors). If each information material is on a different subject (which it has to be in order to prevent a learning effect), a problem is that it could be easier/harder to understand than others independent of the kind of medium, therefore skewing the results. Example:

  1. Video on how to tie your shoes
  2. Text on quantum mechanics

In addition to that, participants can also have different levels of knowledge about the example subjects, thus increasing the systematic error rate even more.

Task 6

  1. describing populations
  2. understanding user behaviors
  3. explore uncharted waters