SINGLE WHITE FEMALE (1992)

SINGLE WHITE FEMALE (R) Entertaining claptrap. Watching this gothic thriller about a Manhattan software designer (Bridget Fonda) and the clinging, duplicitous psycho roommate (Jennifer Jason Leigh) who turns her life into a nightmare, you're never in doubt that each twist is going to lock into place with machine-tooled precision. Yet the picture has some good, perverse touches, and it's exceedingly well acted. Leigh offers the most convincing portrait of a psychotic in recent films. She captures-and makes funny-the way that insecure, compulsively ''giving'' people can actually be driven by monstrous egos. And Fonda, in a quiet yet vibrant performance, helps give this overheated movie a cool center. B