Table 2.

Study characteristics of studies using the landmark task

	Study	Mean Age	N	Task	Recruited as a clinical control group?	Effect size (Cohen’s d)	Moderator analysis	Additional information
1	Benwell et al. (2014)	68.5	20	LM	N	0.15	A, H, LL, S2	Raw data obtained from authors. Long (243mm = 19.69°) and short (24.3mm = 1.99°) lines used in line length analysis.
2	Harvey et al. (2000)	71.0	18	LM	N	-0.26	A, C, H, S2	T-statistic vs 0 reported for left cue visible and right cue visible conditions. d calculated separately for each, then averaged.
3	Learmonth et al. (2017)	68.8	19	LM	N	0.03	A, H, LL, S1, S2	Raw data obtained from authors. N = 1 excluded from analysis. Long (208.9mm = 14.88°) and short (20.7mm = 1.49°) lines used in line length analysis.
4	Learmonth et al. (2018)	70.4	39	LM	N	-0.24	A, H, S1, S2	Raw data obtained from authors.
5	Schmitz and Peigneux (2011)	69.4	19	LM	N	0.45	A, H, S2	T-statistic against chance (i.e., 50% “left longer”) reported and used to calculate d.
6	Zeller and Hullin (2018)	75.0	59	LM	N	0.54	A, H	Cohen’s d reported against chance (i.e., 50% “left end closer”).

A Age, C Cues, H Handedness, LL line length, S₁ Sex (separate data for males and females), S₂ Sex (Percentage male)