Millisecond Forums

If I'm understanding your description correctly, you'll want separate <list>s:
- One weighted list for the target location(s), and
- One for the associated filler locations.

You can prevent the latter list from selecting the same location as the target (already chosen in the 1st list) by using a /not constraint.

Thank you Dave, that does indeed sound like what I would need, however, I cannot find any documentation on the 'not constraint', and the following primitive attempt makes a mess of the locations, is there any example I could model this after?


############# lists #####################
### positions:::::::::::::::::
<list hpos>
/items = (hposition_list_set8)
/selectionmode = values.listnumber
/selectionrate = always
</list>
#list for filler items with 'not' contraint
<list hpos_filler>
/items = (hposition_list_set8)
/selectionmode = values.listnumber
/selectionrate = always
/not = (values.hpos1)
</list>
#weighted hpos list for target: --> note this had to be both vertical and horiztonatl positions
<list hposition_list_set8>
/items =(50.0,50.0,50.0,50.0,50.0,50.0,50.0,50.0,50.0,71.21,80.0,71.211, 50.01, 28.79,20.01, 28.791)
/selectionrate = always
</list>
#weighted vpos_list for target
<list vposition_list_set8>
/items = (20.02,20.02,20.02,20.02,20.02,20.02,20.02,20.02,20.02, 28.792, 50.02, 71.212, 80.02, 71.2121, 50.021, 28.7921)
/selectionmode = list.hposition_list_set8.currentindex
/selectionrate = always
</list>
#vpos for fillers:
<list vposition_list_set8_filler>
/items = (20.02, 28.792, 50.02, 71.212, 80.02, 71.2121, 50.021, 28.7921)
/selectionmode = list.hposition_list_set8.currentindex
/selectionrate = always
/= not(values.vpos1)
</list>
#end lists
#end lists


########## trials::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::
<surveypage codepage>
/ showpagenumbers = false
/ showquestionnumbers = false
/ questions = [1=codebox]
</surveypage>
<textbox codebox>
/ caption = "Select and copy the following code: THE KEYBOARD DOES NOT WORK: copy the code using the mouse"
/ defaultresponse = values.code
/txcolor = (255, 200, 0)
/position = (50,50)
</textbox>


#-----------------#TRIAL TYPES:: -------------------------------------------------
FORMFORMFORMFORMFORMFORMFORM
777777777777777777777777777777777777777777777777777
<trial set8_target_diamond_dis_form>
/ontrialbegin = [values.listnumber = 1; values.hpos1 = list.hpos.nextvalue; values.vpos1 = list.vposition_list_set8.nextvalue;
values.distractor_position_random = floor(rand(1,8));
values.filler_position1 = list.hpos_filler.nextvalue; values.filler_position1_v = list.vposition_list_set8_filler.nextvalue;
values.filler_position2 = list.hpos_filler.nextvalue; values.filler_position2_v = list.vposition_list_set8_filler.nextvalue;
values.filler_position3 = list.hpos_filler.nextvalue; values.filler_position3_v = list.vposition_list_set8_filler.nextvalue;
values.filler_position4 = list.hpos_filler.nextvalue; values.filler_position4_v = list.vposition_list_set8_filler.nextvalue;
values.filler_position5 = list.hpos_filler.nextvalue;values.filler_position5_v = list.vposition_list_set8_filler.nextvalue;
values.filler_position6 = list.hpos_filler.nextvalue;values.filler_position6_v = list.vposition_list_set8_filler.nextvalue;
values.filler_position7 = list.hpos_filler.nextvalue;values.filler_position7_v = list.vposition_list_set8_filler.nextvalue]

/ontrialbegin = [values.line_ori_target = floor(rand(1,3)); values.line_ori_filler1 = floor(rand(1,5)); values.line_ori_filler2 = floor(rand(1,5)); values.line_ori_filler3 = floor(rand(1,5));values.line_ori_filler4 = floor(rand(1,5));
values.line_ori_filler5 = floor(rand(1,5)); values.line_ori_filler6 = floor(rand(1,5)); values.line_ori_filler7 = floor(rand(1,5));]

/ontrialbegin = [if(values.line_ori_target==1)values.correct_response=(44) else values.correct_response =(50)]
/stimulusframes = [1=target_shape, horizontal_line1, vertical_line1,filler_1, filler_2, filler_3, filler_4, filler_5, filler_6, filler_7, distractor_1, horizontal_line_slanted_up_left1, horizontal_line_slanted_up_right1, vertical_line_slanted_left1, vertical_line_slanted_right1,vertical_line_slanted_right2,vertical_line_slanted_left2,horizontal_line_slanted_up_left2,horizontal_line_slanted_up_right2,vertical_line_slanted_right3,vertical_line_slanted_left3,horizontal_line_slanted_up_left3,horizontal_line_slanted_up_right3,vertical_line_slanted_right4,vertical_line_slanted_left4,horizontal_line_slanted_up_left4,horizontal_line_slanted_up_right4,vertical_line_slanted_right5,vertical_line_slanted_left5,horizontal_line_slanted_up_left5,horizontal_line_slanted_up_right5,vertical_line_slanted_right6,vertical_line_slanted_left6,horizontal_line_slanted_up_left6,horizontal_line_slanted_up_right6, vertical_line_slanted_right7,vertical_line_slanted_left7,horizontal_line_slanted_up_left7,horizontal_line_slanted_up_right7,cover_picture]
/validresponse = ("z","m")
/iscorrectresponse = [trial.set8_target_diamond_dis_form.response == values.correct_response]
/timeout = values.time_out
/posttrialpause = values.post_trial_pause
/pretrialpause = floor(rand(values.jitter_low,values.jitter_high))
</trial>

It worked out, the problem I ran into was that adding the "/not" constraint did something to the 'nextvalue', this no longer seemed to be selected sequentially (simply the net value after skipping the value indicated by the "/not" constraint), the way that is was resolved was by adding:

/ontrialend= [list.vpos_filler.reset();]
/ontrialend= [list.hpos_filler.reset();]

at the end of the trail, which seemed to put the lists back in the original order and make the whole thing work again