1 O X O
pre-experimental design
2R O O
R O X O
randomized controlled trial
3R O Xa O
R O Xb O
RCT with 2 specific interventions
4R O Xs O
R O Xs + Xa O
comparing standard intervention to standard intervention plus new intervention
5R X O
R O
posttest only RCT
6R O X O O
R O O X O
crossover study with control condition
7R O Xa O Xb O
R O Xb O Xa O
crossover study design with 2 different interventions compared in different orders
8N O O
N O X O
nonrandomized controlled trial
9N O Xa O
N O Xb O
NCT comparing 2 treatments
10R O Xam O
R O Xaf O
R O Xbm O
R O Xbf O
factorial design
11A: initial phase where baseline observvation and data is collected
B: intervention, observe and collect data
A: remove intervention, observe and collect data
single subject design