single aspect of life (Durant and Shepherd, 2009).
Through communication, one can understand his
fellow and find out information about the surrounding
so that he can take measures and decisions as the
response of the given information (Scollo and
Carbaugh, 2013). The interpersonal communication
is the most effective form of communication in
changing behavior, opinions, perceptions and attitude
compared to other forms of communication
(Wahlström, 2010). The interpersonal
communication occurs between two or more people
with a face to face conversation along with the media
and the presence of direct and conscious feedback. In
interpersonal communication, the deep and detail
communication may take place since the
communication is dialogical and the communicants
can talk about private matters. The level and context
of the interpersonal communication represent the
smallest human interaction unit before entering
various levels, namely: group communication,
organization communication, public communication,
and mass communication (Powers, 1995).
The phenomenon of students’ inability in
interpersonal communication needs to get special
attention from all of the teachers in school. One of the
development that needs to be achieved by the students
at school is the personal-social development,
particularly the interpersonal communication skill
development. The difficulty faced by the students are
generally caused by the students who still lack of
communication skill particularly in communicating
with other people in school environment. Therefore,
it caused the students hard to adapt directly, failed to
be assertive and expressed their feelings. Considering
the issues happened recently where there were lots of
juvenile delinquency issues which happened because
the students are all in the same teen age that need the
fulfillment of social needs and recognition from their
peers. Thus the presence of the negative cohesiveness
caused by the lack of communication between the
students that lead to the unwanted events (da
Conceição-Heldt and Meunier, 2014), this can be
minimized by consulting the result of the previous
research conducted toward the function of
communication and cohesiveness and how to realize
it in groups (Zaccaro, 1991). This issue cannot be left
since it affects the achievements and social
interaction of the students.
Learning activity in the nature, hill, mountain, and
forest can be an unlimited adventure and learning
place where the outdoor class has lots of potential to
improve the cognitive and physical aspects of the
students (Storli and Hagen, 2010) (Humberstone and
Stan, 2012) (Waite, Bølling, and Bentsen, 2016)
(Davies and Hamilton, 2016). There are three related
formulas in the learning performed in the nature,
namely, adventure/challenge aspect, outdoor aspect
and education aspect (Martin and Ho, 2009),
(Karppinen, 2012). The adventure in the nature along
with camping education experience provide lots of
different challenges and difficulties. The students are
required to adapt with the nature (Zimmermann and
Saura, 2017), for example when they walk along the
river, hike the hill, make the tent, and do challenge
activities or other adventures. Therefore the
interaction communication will be made and the
teamwork from the group member will be built. The
benefits of the Outdoor Education is very big mainly
in shaping the character and social values (Kelk,
1994) (Stewart, Harada, Fujimoto, and Nagazumi,
1996) (Potter, Socha, and O’Connell, 2012) (Ooko,
Muthomi, and Odhiambo, 2015) (Atencio, Tan, Ho,
and Ching, 2015). By giving the typical contribution
through sharing experience with other people, the
experience found is very educative (Taniguchi,
Freeman, and Richards, 2005), meaning that the
experience give a deep impression and beyond the
experience that merely a transaction of a person and
the environment (Stewart et al., 1996) (Rea and
Waite, 2009). The challenging surrounding allows
people to get around the self-belief, behavior and life
values as well as study with the peers (Priest, 1986).
Working together in a small group is a collective
effort. Just as science or art based on field studies or
challenging adventures and utilized the individuals
for the comprehensive group’s growth. These
activities are chosen and designed to achieve the
objectivity in general means (Purdie, Neill, and
Richards, 2002) (Ho, 2013), particularly aimed to the
behavior and social relations development. This
consists of initiation, leadership, communication,
decision making, teamwork, creativity, risk facing,
and trust (Marinho, Santos, Manfroi, Figueiredo, and
Brasil, 2017).
Consequently, a program that can give the chance
and experience for the students to develop their
cohesiveness and communication is needed. Through
a good and appropriate learning method, it is expected
that the students can improve their cohesiveness and
communication skills. The method used in this
research prioritized the outdoor activity education.
The chosen outdoor education activity is the River
camp. This activity is performed outside the class or
in the nature by camping on the riverside. The
education through nature will make the students
happy since they not only can enjoy the view, inhale
fresh air, be grateful the beauty of nature, but also
they will not get bored easily (Denham and Brown,
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