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Le sondage effectué en 1984 dans l'abri sous roche effondré de Yutil al-Hasa avait livré des assemblages du Paléolithique supérieur final de tradition ahmarienne. De nouveaux sondages en 1993 ont permis de reconnaître des dépôts du Madamaghien et du Natoufien ancien. L'occupation du site ne fui pas continue au cours des 8 000 ans que couvrent approximativement ces deux phases. Pourtant, l'abri occupait alors une situation privilégiée dans la région, ce qui a permis de faire des observations sur les stratégies ď utilisation de l'espace. Cette région comprenait pendant le Pléistocène final des zones favorables (dans ce cas un lac/marécage) dans un passage essentiellement désertique. Mots clés : Jordanie, Yutil el-Hasa. paléolithique supérieur, épipaléolithique.

This study assessed the effectiveness of a program designed to increase compliance with teacher commands in a regular 5th grade math class. A reversal design (A‐B‐B'‐A‐B') was employed. The teacher used a discriminative stimulus to signal the students as to the availability of an opportunity to earn a point towards a reinforcer. To receive the point the students were required to return the signal and initiate compliance. The entire class was involved in the program; however, data were recorded on two students, one identified by the teacher as noncompliant; the other served as a control. The results indicated that the program was effective in increasing initiation of compliance to teacher commands. However, serious questions were raised about the generalizability of such a program.

With funding from NSF, the Nanoscale Informal Science Education Network aims to use informal learning experiences to engage families, schoolchildren, and adults in nanoscale science, engineering, and technology in science centers and museums across the US.