Millisecond Forums

Here I have multiple Stimuli and multiple blocks, when i run this script it is happening that in starting blocks randomization is low i.e. it shows large sequence of same category 
means block is less jumbled but in last few block randomization is high. 
is it the inquisite algorithm work that way? like less randomization in starting blocks  and high randomization in latter blocks  or can I achieve high randomization in starting  blocks also?  

<item attributeAlabel>
/1 = "tp.jpeg"
</item>

<item attributeA>
/1 = "positive1.jpg"
/2 = "positive1.jpg"
/3 = "positive3.jpg"
/4 = "positive4.jpg"
/5 = "positive5.jpg"
/6 = "positive6.jpg"
/7 = "positive7.jpg"
/8 = "positive8.jpg"
</item>

<item attributeBlabel>
/1 = "td.jpeg"
</item>

<item attributeB>
/1 = "negative1.jpg"
/2 = "negative2.jpg"
/3 = "negative3.jpg"
/4 = "negative4.jpg"
/5 = "negative5.jpg"
/6 = "negative6.jpg"
/7 = "negative7.jpg"
/8 = "negative8.jpg"
</item>

<item targetAlabel>
/1 = "Red & White"
</item>

<item targetA>
/1 = "rw1.jpg"
/2 = "rw2.jpg"
/3 = "rw3.jpg"
/4 = "rw4.jpg"
/5 = "rw5.jpg"
/6 = "rw6.jpg"
/7 = "rw7.jpg"
/8 = "rw8.jpg"
</item>

<item targetBlabel>
/1 = "Gold Flake"
</item>

<item targetB>
/1 = "gf1.jpg"
/2 = "gf2.jpg"
/3 = "gf3.jpg"
/4 = "gf4.jpg"
/5 = "gf5.jpg"
/6 = "gf6.jpg"
/7 = "gf7.jpg"
/8 = "gf8.jpg"
</item>

<block attributepractice>
/ bgstim = (attributeAleft, attributeBright)
/ trials = [
1=instructions;
2-21 = random(attributeA, attributeB);
]
/ errormessage = true(error,200)
/ responsemode = correct
</block>

<block targetcompatiblepractice>
/ bgstim = (targetAleft, targetBright)
/ trials = [
1=instructions;
2-21 = random(targetAleft, targetBright);
]
/ errormessage = true(error,200)
/ responsemode = correct
</block>

<block targetincompatiblepractice>
/ bgstim = (targetAright, targetBleft)
/ trials = [
1=instructions;
2-21 = random(targetAright, targetBleft);
]
/ errormessage = true(error,200)
/ responsemode = correct
</block>

<block targetcompatiblepracticeswitch>
/ bgstim = (targetAleft, targetBright)
/ trials = [
1=instructions;
2-41 = random(targetAleft, targetBright);
]
/ errormessage = true(error,200)
/ responsemode = correct
</block>

<block targetincompatiblepracticeswitch>
/ bgstim = (targetAright, targetBleft)
/ trials = [
1=instructions;
2-41 = random(targetAright, targetBleft);
]
/ errormessage = true(error,200)
/ responsemode = correct
</block>

<block compatibletest1>
/ bgstim = (targetAleftmixed, orleft, attributeAleft, targetBrightmixed, orright, attributeBright)
/ trials = [1=instructions;
3,5,7,9,11,13,15,17,19,21= random(targetAleft, targetBright);
2,4,6,8,10,12,14,16,18,20 = random(attributeA, attributeB)]
/ errormessage = true(error,200)
/ responsemode = correct
/ ontrialend = [
if(block.compatibletest1.latency <= 10000 && block.compatibletest1.currenttrialnumber != 1 ) values.sum1a = values.sum1a + block.compatibletest1.latency;
if(block.compatibletest1.latency <= 10000 && block.compatibletest1.currenttrialnumber != 1 ) values.n1a += 1;
if(block.compatibletest1.latency <= 10000 && block.compatibletest1.currenttrialnumber != 1 ) values.ss1a = values.ss1a + (block.compatibletest1.latency * block.compatibletest1.latency);
if(block.compatibletest1.latency <= 10000 && block.compatibletest1.currenttrialnumber != 1 ) values.n_correct += block.compatibletest1.correct;
]
</block>

<block compatibletest2>
/ bgstim = (targetAleftmixed, orleft, attributeAleft, targetBrightmixed, orright, attributeBright)
/ trials = [
2,4,6,8,10,12,14,16,18,20,22,24,26,28,30,32,34,36,38,40 = random(targetAleft, targetBright);
1,3,5,7,9,11,13,15,17,19,21,23,25,27,29,31,33,35,37,39 = random(attributeA, attributeB)]
/ errormessage = true(error,200)
/ responsemode = correct
/ ontrialend = [
if(block.compatibletest2.latency <= 10000) values.sum1b = values.sum1b + block.compatibletest2.latency;
if(block.compatibletest2.latency <= 10000) values.n1b += 1;
if(block.compatibletest2.latency <= 10000) values.ss1b = values.ss1b + (block.compatibletest2.latency * block.compatibletest2.latency);
if(block.compatibletest2.latency <= 10000) values.n_correct += block.compatibletest2.correct;
]
</block>

<block incompatibletest1>
/ bgstim = (targetBleftmixed, orleft, attributeAleft, targetArightmixed, orright, attributeBright)
/ trials = [1=instructions;
3,5,7,9,11,13,15,17,19,21 = random(targetBleft, targetAright);
2,4,6,8,10,12,14,16,18,20 = random(attributeA, attributeB)]
/ errormessage = true(error,200)
/ responsemode = correct
/ ontrialend = [
if(block.incompatibletest1.latency <= 10000 && block.incompatibletest1.currenttrialnumber != 1) values.sum2a = values.sum2a + block.incompatibletest1.latency;
if(block.incompatibletest1.latency <= 10000 && block.incompatibletest1.currenttrialnumber != 1 ) values.n2a += 1;
if(block.incompatibletest1.latency <= 10000 && block.incompatibletest1.currenttrialnumber != 1 ) values.ss2a = values.ss2a + (block.incompatibletest1.latency * block.incompatibletest1.latency);
if(block.incompatibletest1.latency <= 10000 && block.incompatibletest1.currenttrialnumber != 1 ) values.n_correct += block.incompatibletest1.correct;
]
</block>

<block incompatibletest2>
/ bgstim = (targetBleftmixed, orleft, attributeAleft, targetArightmixed, orright, attributeBright)
/ trials = [
2,4,6,8,10,12,14,16,18,20,22,24,26,28,30,32,34,36,38,40 = random(targetBleft, targetAright);
1,3,5,7,9,11,13,15,17,19,21,23,25,27,29,31,33,35,37,39 = random(attributeA, attributeB)]
/ errormessage = true(error,200)
/ responsemode = correct
/ ontrialend = [
if(block.incompatibletest2.latency <= 10000) values.sum2b = values.sum2b + block.incompatibletest2.latency;
if(block.incompatibletest2.latency <= 10000) values.n2b += 1;
if(block.incompatibletest2.latency <= 10000) values.ss2b = values.ss2b + (block.incompatibletest2.latency * block.incompatibletest2.latency);
if(block.incompatibletest2.latency <= 10000) values.n_correct += block.incompatibletest2.correct;
]
</block>

<block compatibletestinstructions>
/ bgstim = (targetAleftmixed, orleft, attributeAleft, targetBrightmixed, orright, attributeBright)
/ trials = [1=instructions]
/ recorddata = false
</block>

<block incompatibletestinstructions>
/ bgstim = (targetBleftmixed, orleft, attributeAleft, targetArightmixed, orright, attributeBright)
/ trials = [1=instructions]
/ recorddata = false
</block>

<block summary>
/skip = [parameters.showsummaryfeedback == false]
/ trials = [1=summary]
/ recorddata = false
</block>

<expt>
/ preinstructions = (iatintro)
/subjects = (1 of 2)
/groupassignment = groupnumber
/ blocks = [
1=targetcompatiblepractice;
2=attributepractice;
3=compatibletest1;
4=compatibletestinstructions;
5=compatibletest2;
6=targetincompatiblepractice;
7=incompatibletest1;
8=incompatibletestinstructions;
9=incompatibletest2;
10=summary;
]
/onexptend = [values.completed = 1]
</expt>

<expt>
/ preinstructions = (iatintro)
/subjects = (2 of 2)
/groupassignment = groupnumber
/ blocks = [
1=targetincompatiblepractice;
2=attributepractice;
3=incompatibletest1;
4=incompatibletestinstructions;
5=incompatibletest2;
6=targetcompatiblepractice;
7=compatibletest1;
8=compatibletestinstructions;
9=compatibletest2;
10=summary;
]
/onexptend = [values.completed = 1]
</expt>