and piecemeal approaches. To the thousands of school chil-
dren and adults who served as subjects and the school officials
who permitted the use of their schools in various cities and
smaller communities over ten years, the author likewise owes a
debt of gratitude. Finally, about fifty nationally known artists,
in discussions with the author, provided that necessary check
and corrective to the direction and orientation needed in carry-
ing out the entire research program.

Of the contributions of many others in scattered places, who
by correspondence or direct contact added something to the
ideas here set forth, the author is deeply appreciative.

In a sense these viewpoints as set forth are minimal state-
ments. This was purposely done to save the reader's time and to
make the perspective more comprehensive and the nature of
art more comprehensible. The book could have been several
times this size but has been intentionally restricted to outline
form, leaving to the interested reader amplified presentations
of data to be found in the published articles of the author and
his coworkers in scientific and other journals. To these, thirty
of which appear in issues of the Psychological Monographs of
1933, 1936, and 1939, frequent reference is made in footnotes
and in the text. The author expresses appreciation to the Psy-
chological Review Publishing Company for permitting the
use of certain summary material and illustrations previously
appearing in the monographs. The reader will also find in the
bibliographies at the end of each chapter other source ma-
terials which constitute specific or general bases for the view-
points developed in the volume. Acknowledgment for the use
of illustrative material appears also at the place where the ma-
terial is used. The author's appreciation is also expressed to his
secretary, Marjorie Anderson Synhorst, for her many critical
comments and aid in the preparation of the manuscript.

IOWA CITY, IOWA, NORMAN CHARLES MEIER.
January, 1942.

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