The　Triple　Dominance　Measure　(choosing　between　prosocial,　individualistic,　and　competitive　options)　and　the　Slider　Measure　(＂sliding＂　between　various　orientations,　for　example,　from　individualistic　to　prosocial)　are　two　widely　used　techniques　to　measure　social　value　orientation,　that　is,　the　weight　individuals　assign　to　own　and　others＇　outcomes　in　interdependent　situations.　Surprisingly,　there　is　only　moderate　correspondence　between　these　measures,　but　it　is　unclear　why　and　what　the　implications　are　for　identifying　individual　differences　in　social　value　orientation.　Using　a　dataset　of　8021　participants　from　31　countries　and　regions,　this　study　revealed　that　the　Slider　Measure　identified　fewer　competitors　than　the　Triple　Dominance　Measure,　accounting　for　approximately　one-third　of　the　non-correspondence　between　the　two　measures.　This　is　(partially)　because　many　of　the　Slider　items　do　not　afford　a　competitive　option.　In　items　where　competition　is　combined　with　individualism,　competitors　tended　to　make　the　same　choices　as　individualists.　Futhermore,　we　demonstrated　the　uniqueness　of　competitors.　Compared　to　prosocials　and　individualists,　competitors　exhibited　lower　levels　of　both　social　mindfulness　and　trust.　Overall,　the　present　work　highlights　the　importance　of　situational　affordances　in　measuring　personality,　the　benefits　of　distinguishing　between　individualists　and　competitors,　and　the　importance　of　utilizing　a　measure　that　distinguishes　between　these　two　proself　orientations.