Hi Melody,
First of all, welcome to Skuid!
Not all of the formulas available in Salesforce Formulas are available in Skuid — ISPICKVAL() is one of them. As Emma said, there’s a cleaner approach using CASE():
CASE(
{{ANI_Segmentation_Row__c}},
‘CMNSS1’,‘Yes’,
‘CMNSS2’, ‘Yes’,
‘CMNSS4’, ‘Yes’,
‘CMNSS5’, ‘Yes’,
‘CMSS1’, ‘Yes’,
‘CMSS3’, ‘Yes’,
‘K12NCM1’, ‘Yes’,
‘K12NCM2’, ‘Yes’,
‘OK12W1’, ‘Yes’,
‘OK12W2’, ‘Yes’,
‘OK12W3’, ‘Yes’,
‘PNSL1’, ‘Yes’,
‘PNSL2’, ‘Yes’,
‘PNSL3’, ‘Yes’,
‘SLFS1’, ‘Yes’,
‘SLFS2’, ‘Yes’,
‘SSANR1’, ‘Yes’,
‘SSNCM1’, ‘Yes’,
‘SSNCM2’, ‘Yes’,
‘SSNCM3’, ‘Yes’,
‘No’
)
Here, {{ANI_Segmentation_Row__c}} is pulling in the value of the {{ANI_Segmentation_Row__c}} from the Contact record, and then all of the subsequent lines are saying "If ANI_Segmentation_Row__c is this, then return “Yes”, with the final “No” being the default that is returned if none of the cases are met.