Table 1. Concentration and the feasibility and acceptability of a smartphone game-play intervention.

Rating scale	n	Mean	Median	Mode	SD	Range
Concentration
Over the past week, how much did your intrusive memories disrupt your concentration?a	22	5.73	6.00	10	3.68	0–10
Over the past week, how much difficulty did you have concentrating generally?b	22	5.68	5.50	9	3.59	0–10
Feasibility and acceptability
Smartphone-delivered interventions
Would you find it useful to have fewer intrusive memories of trauma each day?c	22	6.55	6.50	10	2.77	1–10
How easy was it to download the app?d	21	9.67	10.00	10	1.32	4–10
How easy did you find playing Tetris?e	22	6.73	6.00	5	2.19	3–10
Did you enjoy playing Tetris?f	22	7.55	9.00	10	3.33	0–10
Did you feel that Tetris distracted you from having any unpleasant thoughts/images/feelings?g	22	7.45	8.00	10	2.26	2–10
How likely is it that you would play Tetris by yourself, in a different environment?h	22	6.77	8.00	10	3.38	0–10
Would you recommend playing Tetris to a friend?i	22	8.36	9.50	10	2.40	1–10
Do you think computer game-play would be an acceptable way to reduce the daily frequency of the intrusive memories?j	20	6.65	7.00	10	2.94	0–10
How much would you prefer an intervention that is delivered by a computer/smartphone compared to seeing a doctor/psychologist in person?k	21	5.62	6.00	10	3.75	0–10

^a0 = not at all disruptive; 10 = extremely disruptive;

^b0 = no concentration difficulties; 10 = extreme concentration difficulties;

^c0 = not at all useful; 10 = very useful;

^d0 = not at all; 10 = very easy;

^e0 = not at all; 10 = extremely easy;

^f0 = not at all; 10 = very much enjoy;

^g0 = not at all; 10 = very much;

^h0 = not at all; 10 = very likely to play;

ⁱ0 = certainly not; 10 = certainly recommend;

^j0 = not at all acceptable; 10 = very acceptable;

^k0 = prefer doctor/psychologist; 10 = prefer smartphone/computer; SD, standard deviation.