EXHIBIT 11 COMPUTER TASK GROUP, INCORPORATED COMPUTATION OF DILUTED EARNINGS PER SHARE UNDER THE TREASURY STOCK METHOD SET FORTH IN STATEMENT OF FINANCIAL ACCOUNTING STANDARDS NO. 128 "EARNINGS PER SHARE" (AMOUNTS IN THOUSANDS, EXCEPT PER SHARE DATA) QUARTER ENDED THREE QUARTERS ENDED SEPT. 28, SEPT. 29, SEPT. 28, SEPT. 29, 2001 2000 2001 2000 --------- --------- ---------- ---------- Weighted-average number of shares outstanding during period 16,443 16,207 16,415 16,140 Add Common Stock equivalents - incremental shares under stock option plans* 0 0 0 0 ------ ------ ------- ------ Number of shares on which diluted earnings (loss) per share is based 16,443 16,207 16,415 16,140 ------ ------ ------- ------ Net income (loss) for the period $ 182 $ (209) $(2,555) $(5,832) ======= ======= ======== ======== Basic and diluted earnings (loss) per share $ 0.01 $(0.01) $ (0.16) $ (0.36) ======= ======= ======== ======== * For the quarter ended September 28, 2001, there were no incremental shares outstanding as there were no dilutive stock options outstanding, For the remaining quarters presented, as the Company had a net loss for the periods presented, the number of incremental shares under the Company's stock option plans is considered to be zero as the inclusion of such shares would cause the diluted loss per share calculation to be anti-dilutive 13