Experimental Designs

View the YouTube clip https://www.youtube.com/watch?v=VhZyXmgIFAo to respond to these following 4 questions. Respond with anything to move past this question, every answer will be marked correct :)

What is the initial conclusion drawn by Mike?

• That it is better to water a plant with 100ml of water three times a week

• That it is better to water a plant once a week

Why is the conclusion that 'it is better to water a plant once a week' unfair?

• Because Mike has a green thumb and is better able to care for the plant

• Because the plants were different plants

• Because different soil was used for the plants

• Because the plants were stored at different light levels

Why should Mike and Molly repeat the trials with their plants both in sunlight a few times?

In scientific experiments everything needs to be constant, except (a)   variable

View the video at https://www.youtube.com/watch?v=9eZYufPP2-o. Respond with anything to move past this question, every answer will be marked correct :)

Which of these is not an experimental design?

• Repeated Measures

• Observation Groups

• Independent Groups

• Matched Pairs

For the repeated measures design, one group of participants take part in both the control and (a)   tasks

Which of the following is not a positive of a repeated measures design?

• Participants may learn what the study is about and want to produce the right result

• Having the same participants means there are less variables

• There are less participants which means that the study may cost less.

Different (a)   are used in each group. This means that each participant does only one condition or performs one task.