documentclass{apa6}

begin{document}

begin{table}[htbp]
begin{threeparttable}
      caption{{Lorem ipsum dolor sit amet, consetetur sadipscing elitr, sed diam nonumy eirmod tempor invidunt ut labore}}
      label{tab:KorrelationenBilder}
      begin{tabular}{@{}llrrr@{}}
     % toprule
&    & multicolumn{3}{c}{Pupillenweite} \
& & Gesamt & Neutral & Negativ\ midrule
Freie Wiedergabe Tag 1 & & &&  \
midrule
       &  Gesamt      & .000   & -.112 & .096 \
         midrule
        & Neutral        & -.146       &  -.192 & -.070  \
         midrule
        & Negativ      &  .086    & -.042 & .172  \
                   midrule

Freie Wiedergabe Tag 2 & & && \
midrule
       &  Gesamt     & -.135    & -.223 & -.036    \
         midrule
        & Neutral        &-.286 &  -.293 & -.219  \
         midrule
        & Negativ      &  -.013    & -.136 & .087   \
                   midrule

                   Wiedererkennen Tag 2 & & &&  \
midrule
       &  Gesamt     & -.201  & -.295 & -.079    \
         midrule
        & Neutral         & -.179       &  -.252 & -.082  \
         midrule
        & Negativ     &  -.182     & -.280 & -.059  \
                   midrule
       end{tabular}
      begin{tablenotes}[para,flushleft]
         {small
            textit{Anmerkungen.} Lorem ipsum dolor sit amet, consetetur sadipscing elitr, sed diam nonumy eirmod tempor invidunt ut labore Lorem ipsum dolor sit amet, consetetur sadipscing elitr, sed diam nonumy eirmod tempor invidunt ut labore
         }
      end{tablenotes}
   end{threeparttable}
   end{table}
end{document}