Plants grow naturally towards the strongest source of light, this is called phototropism. They do this in order to maximise their exposure to the sun and increase the amount of photosysnthesis (and therefore growth). This is a survival mechansim.
researcher will either use random assignment or matching What do random assignment and matching have in common? They are both designed to create equivalent groups of participants. Random assignment is to random selection as _____ is to _____
The use of random allocation and the elimination of allocation bias meant that treatment groups would be similar in baseline characteristics, thereby minimising confounding. Confounding is a difference between treatment groups in the characteristics that influence the association between the treatments and outcomes.