Despite turmoil in the housing markets that includes record foreclosure numbers, mortgage rate increases and home price depreciation, homeowners don’t believe there’s a real estate slump, according to a new poll. Most - 55 percent - are confident that their homes continued to increase in value compared with a year ago, according to a nationwide telephone survey conducted this month by The Boston Consulting Group (BCG), a business and management strategy firm. The perception gap between what Americans believe and the current housing market reality can influence their behavior. According to some pundits, most homeowners (76 percent) have not, for example, pared back their consumer spending in response to current market conditions.