Although the Tigers edged possession by 55 per cent to 45, they only created one more chance than the Iron and conceded far more set-pieces around the area, they finished the match on the end of a resounding beating.
"Once again we have made it difficult for ourselves by giving away an early goal," said Baraclough.
"But after that I thought we were the dominant side and we didn't want halfotime to come. Individual errors costing us dearly and that is what we have got to try and stamp out."
Baraclough brought in nine players during January's transfer window, and was pleased with the contribution they have made.
"We have got to make sure that the new faces settle in quickly but despite the 5-1 result I did think there was some promising signs," he added.
"We have got some strong characters in our dressing room now. There is enough there to make believe that we are still more than capable of getting out of trouble."
Nigel Pearson, the Hull boss, praised his strike pairing of Matty Fryatt and Aaron Mclean.
Fryatt scored a hat-trick, while Mclean got two, as the Tigers' clinical finishing ultimately proved the difference.
"I am delighted for Aaron because he has been so unlucky not to get on the score sheet before," said Pearson.
"We all know the value he brings to our team in the dressing room and the fans too can see how hard he has been working.
"As for Matty he's been on fire again, that is why we wanted to bring him here from Leicester."