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  • Notice: Array to string conversion in theme_biblio_tabular() (line 244 of C:\data\ictg-web\html\sites\all\modules\biblio\includes\biblio_theme.inc).
  • Notice: Array to string conversion in theme_biblio_tabular() (line 244 of C:\data\ictg-web\html\sites\all\modules\biblio\includes\biblio_theme.inc).
  • Notice: Array to string conversion in theme_biblio_tabular() (line 244 of C:\data\ictg-web\html\sites\all\modules\biblio\includes\biblio_theme.inc).
  • Notice: Array to string conversion in theme_biblio_tabular() (line 244 of C:\data\ictg-web\html\sites\all\modules\biblio\includes\biblio_theme.inc).
  • Notice: Array to string conversion in theme_biblio_tabular() (line 244 of C:\data\ictg-web\html\sites\all\modules\biblio\includes\biblio_theme.inc).
  • Notice: Array to string conversion in theme_biblio_tabular() (line 244 of C:\data\ictg-web\html\sites\all\modules\biblio\includes\biblio_theme.inc).
  • Notice: Array to string conversion in theme_biblio_tabular() (line 244 of C:\data\ictg-web\html\sites\all\modules\biblio\includes\biblio_theme.inc).
  • Notice: Array to string conversion in theme_biblio_tabular() (line 244 of C:\data\ictg-web\html\sites\all\modules\biblio\includes\biblio_theme.inc).
  • Notice: Array to string conversion in theme_biblio_tabular() (line 244 of C:\data\ictg-web\html\sites\all\modules\biblio\includes\biblio_theme.inc).
  • Notice: Array to string conversion in theme_biblio_tabular() (line 244 of C:\data\ictg-web\html\sites\all\modules\biblio\includes\biblio_theme.inc).
  • Notice: Array to string conversion in theme_biblio_tabular() (line 244 of C:\data\ictg-web\html\sites\all\modules\biblio\includes\biblio_theme.inc).
  • Notice: Array to string conversion in theme_biblio_tabular() (line 244 of C:\data\ictg-web\html\sites\all\modules\biblio\includes\biblio_theme.inc).
  • Notice: Array to string conversion in theme_biblio_tabular() (line 244 of C:\data\ictg-web\html\sites\all\modules\biblio\includes\biblio_theme.inc).
  • Notice: Array to string conversion in theme_biblio_tabular() (line 244 of C:\data\ictg-web\html\sites\all\modules\biblio\includes\biblio_theme.inc).
  • Notice: Array to string conversion in theme_biblio_tabular() (line 244 of C:\data\ictg-web\html\sites\all\modules\biblio\includes\biblio_theme.inc).
  • Notice: Array to string conversion in theme_biblio_tabular() (line 244 of C:\data\ictg-web\html\sites\all\modules\biblio\includes\biblio_theme.inc).
  • Notice: Array to string conversion in theme_biblio_tabular() (line 244 of C:\data\ictg-web\html\sites\all\modules\biblio\includes\biblio_theme.inc).
  • Notice: Array to string conversion in theme_biblio_tabular() (line 244 of C:\data\ictg-web\html\sites\all\modules\biblio\includes\biblio_theme.inc).
  • Notice: Array to string conversion in theme_biblio_tabular() (line 244 of C:\data\ictg-web\html\sites\all\modules\biblio\includes\biblio_theme.inc).
  • Notice: Array to string conversion in theme_biblio_tabular() (line 244 of C:\data\ictg-web\html\sites\all\modules\biblio\includes\biblio_theme.inc).
  • Notice: Array to string conversion in theme_biblio_tabular() (line 244 of C:\data\ictg-web\html\sites\all\modules\biblio\includes\biblio_theme.inc).
  • Notice: Array to string conversion in theme_biblio_tabular() (line 244 of C:\data\ictg-web\html\sites\all\modules\biblio\includes\biblio_theme.inc).
  • Notice: Array to string conversion in theme_biblio_tabular() (line 244 of C:\data\ictg-web\html\sites\all\modules\biblio\includes\biblio_theme.inc).
  • Notice: Array to string conversion in theme_biblio_tabular() (line 244 of C:\data\ictg-web\html\sites\all\modules\biblio\includes\biblio_theme.inc).
  • Notice: Array to string conversion in theme_biblio_tabular() (line 244 of C:\data\ictg-web\html\sites\all\modules\biblio\includes\biblio_theme.inc).
  • Notice: Array to string conversion in theme_biblio_tabular() (line 244 of C:\data\ictg-web\html\sites\all\modules\biblio\includes\biblio_theme.inc).
  • Notice: Only variables should be passed by reference in theme_biblio_tabular() (line 285 of C:\data\ictg-web\html\sites\all\modules\biblio\includes\biblio_theme.inc).

The effect of positive feedback in a constraint-based intelligent tutoring system

TitleThe effect of positive feedback in a constraint-based intelligent tutoring system
Publication TypeJournal Article
AuthorsMitrovic A, Ohlsson S, Barrow DK
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