\begin{tabular}{lrrlll}
\toprule
              Author &  \#Foci &  \#Subjects &                          Contrast &            Task Modality &                                        Task Stimulus \\
\midrule
     Beneventi et al &     24 &         12 &          2-back > 1-back > 0-back &              n-back task &  visual scrambled drawings, visual facial expression \\
       Carrion et al &     16 &         13 &                   2-back > 0-back &              n-back task &                                       visual numbers \\
       Carrion et al &     18 &         13 &                   3-back > 0-back &              n-back task &                                       visual numbers \\
          Cruz et al &     27 &         23 &                                 - &   reversal learning task &                              visual identical shapes \\
            Di et al &     13 &         49 &                   1-back > 2-back &              n-back task &                                       visual letters \\
            Di et al &     13 &         49 &                   2-back > 1-back &              n-back task &                                       visual letters \\
  Drobyshevsky et al &     13 &         31 &                   2-back > 0-back &              n-back task &                                       visual letters \\
     Duggirala et al &     62 &         50 &                   2-back > 0-back &              n-back task & visual word recognition, visual object, visual faces \\
Koppelstaetter et al &     16 &         15 &                   2-back > 0-back &              n-back task &                                               verbal \\
           Lee et al &     58 &         14 &                     1-back > rest &              n-back task &                                       visual numbers \\
         Nobre et al &     30 &         10 &               retrocue and precue &        experimental task &                                   visual spatial cue \\
         Nobre et al &      9 &         10 &                 retrocue > precue &        experimental task &                                   visual spatial cue \\
         Nobre et al &      3 &         10 &                 precue > retrocue &        experimental task &                                   visual spatial cue \\
       Padilla et al &     10 &         25 &                   2-back > 0-back &              n-back task &                                       visual letters \\
       Padilla et al &     13 &         25 &                   3-back > 0-back &              n-back task &                                       visual letters \\
        Pierce et al &     19 &         42 &          2-back > 1-back > 0-back &              n-back task &                                  verbal pseudo-words \\
        Pochon et al &     43 &          6 & 3-back > 2-back > 1-back > 0-back &              n-back task &                                       visual letters \\
       Reilhac et al &     21 &         12 &                sub-dif > baseline & perceptual matching task &                              visual word recognition \\
       Reilhac et al &     14 &         12 &               sub-dif > frame-dif & perceptual matching task &                              visual word recognition \\
       Reilhac et al &      4 &         12 &                 sub-id > baseline & perceptual matching task &                              visual word recognition \\
        Rodger et al &     15 &         22 &             n-back > control task &              n-back task &                                   visual shape color \\
       Schmidt et al &     14 &         50 & 3-back > 2-back > 1-back > 0-back &              n-back task &                                       visual letters \\
           Seo et al &     19 &         22 &                   2-back > 0-back &              n-back task &                                       visual letters \\
        Taylor et al &     23 &         12 &                                 - &              n-back task &                                         visual shape \\
\bottomrule
\end{tabular}
