Enrichment


[kml_flashembed movie="http://www.youtube.com/v/D0ysvjnITDQ" width="640" height="385" allowfullscreen="true" fvars="fs=1" /]

[kml_flashembed movie="http://www.youtube.com/v/BRInBTOsWR0" width="480" height="385" allowfullscreen="true" fvars="fs=1" /]

[kml_flashembed movie="http://www.youtube.com/v/PClwj5hY-JE" width="640" height="385" allowfullscreen="true" fvars="fs=1" /]

[kml_flashembed movie="http://www.youtube.com/v/yZpoyuVP98A" width="640" height="385" allowfullscreen="true" fvars="fs=1" /]

[kml_flashembed movie="http://www.youtube.com/v/z_pOvtOYuIw" width="640" height="385" allowfullscreen="true" fvars="fs=1" /]

References
Van Praag (1999)

Acknowledgments

Video:

http://www.youtube.com/v/D0ysvjnITDQ

http://www.youtube.com/v/BRInBTOsWR0

http://www.youtube.com/v/PClwj5hY-JE

http://www.youtube.com/v/yZpoyuVP98A

http://www.youtube.com/v/z_pOvtOYuIw

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