I have done a bit more digging across multiple sources for my prior question.
I have now come to believe that 0 -1 0 1 specifies phase encoding from anterior to posterior (aka "negative phase-encode blips"), whereas 0 1 0 1 specifies phase encoding from posterior to anterior (aka "positive phase-encode blips"). So the script I inherited was perhaps correct after all but I am not 100% sure so would still like confirmation on this.
Many thanks.
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