Identify the type of research design employed in the situation: Maria wants to know whether caffeine has an effect on the concentration level of college students. She randomly assigned her participants to two treatment conditions. One group was given regular coffee, while the other group was given a decaffeinated coffee. She then administered a concentration task to compare whether there is a difference between the two groups.

Identify the type of research design employed in the situation: Kian and his group mates are college students, who want to know if there is a relationship between the personality type and burnout levels of healthcare workers in public hospitals around Metro Manila. They administered questionnaires to the healthcare workers and analyzed whether there is an association between the variables.

A True Experimental research will have all the following characteristics, EXCEPT:

A Quasi-Experimental research will have all the following characteristics, EXCEPT:

A Causal-comparative (or ex-post facto) research will have all the following characteristics, EXCEPT:

The following are characteristics of Probability sampling, EXCEPT:

Rowena is a business management student, who wants to study the different trends of the food industry on Maginhawa Street. She listed down all the restaurants and food stores in the area, and divided them according to different categories, such as a cafe, desserts, Japanese food, Filipino food, etc. She then picked three stores per category to meet her target sample size of 60 restaurants. What sampling technique did Rowena use?

Mr. Bautista is a sociology instructor, who is currently studying the motivators and experiences of working students in a state university. He recruited participants who are working students. Then, he asked them whether they know someone who can participate in his study. What sampling technique did Mr. Bautista use?

Nadia listed the names of all her classmates in strips of paper and put them inside a box. She is going to ask the first 20 names that she will draw out to answer a survey for her research paper. What sampling technique did Nadia use?

Which of the following quantitative data collection techniques is employed if a researcher studying attention span went to a class and takes note of the number of learners get distracted by off-task activities?

Which of the following quantitative data collection techniques is employed if a researcher develops or adopts a questionnaire measuring Socio-scientific awareness among students and then collects and interprets the responses of the students?

Which of the following quantitative data collection techniques is employed if a researcher obtains research manuscripts written by Grade 12 students and evaluates the extent of how much they have learned from the subject Practical Research 2?

A survey questionnaire asking respondents the degree to which they agree or disagree with a statement can be sensitive to which level of variable measurement?

Demographic data collected from respondents belongs to which level of variable measurement?