Knowledge and skills in
biomedical sciences have reached a level, which is difficult to pass on to students
in the traditional one to two years by traditional lecture methods and are
still expanding. Recently, innovative methods of enabling the students to
acquire the knowledge and skills have been evolved, and include
student-centered and problem-based learning strategies, among others. These
are strategies in which the student is taught how to learn for him/her self and
then becomes responsible for his/her own learning with a certain minimum amount
of guidance from the teachers. Other advantages of using these strategies of
learning and teaching include development of competencies in continuous self
and peer evaluation, self-directed learning leading to continuing medical
education for life, team work, professionalism and professional ethics. These
strategies also increase the chances of attitudinal molding, enhancing good
personal characteristics while discouraging bad ones. Communication skills are
greatly enhanced.
Training of
health professionals started with simply teaching the students the art i.e. the
practice of the profession. This was during the era when the science related to
the practice was hardly known. As the science was discovered, it was
introduced in the training. The training period, however, remained the same.
That meant that the time for learning the art (apprenticeship) became shorter.
Eventually, graduates came out of the schools without the necessary
competencies to enable them to practice the art in a way that was safe for the
patient. Thus about half a century ago, a probational period nicknamed
internship was introduced for the purpose of skills training to improve the
competencies of the graduates to an acceptable level before allowing them to
practice the profession independently.
Various schools
have been playing around with the total period varying the percentage of time
allocated to the sciences. Usually this has been about 40% of the total time.
This period of two years in the five-year medical programme has now proved to
be insufficient because of the science knowledge and skills explosion. The
situation can only get worse.
To compound
this, the methodology of making the students learn the sciences has been and in
most places still is by a series of lectures. As the science base has become
wider and deeper, the lecture time requirement has increased. The extra time
cannot be found without lengthening the duration of the programmes. For many
reasons, increasing the duration of the programmes is not the appropriate
answer.
Therefore, it
has become necessary to introduce strategies, which will enable the students to
learn the science, each person at his/her own pace, continuously and
indefinitely. The backbone of such methods is to teach the students how to
learn by themselves. The SPICES Model of education described by Harden R.M et
al (1984) contains some of such strategies.
Methods
The word
innovative implies change or introduction of new ideas. The methods of
teaching and learning described here are not really new. What is new, however,
is that they have generally not been used in teaching biomedical sciences. The
strategy to be discussed here is that of student-centered problem-based
learning, which is part of the SPICES Model.
The concept of
Student-Centered Learning (SCL) focuses on the realization of the fact that in
the school of health sciences the most important thing is that the student must
learn. All other things must be done to facilitate this process of learning.
Thus, facilities must be created to enable the student learn. The student is
placed at the centre of this sphere of facilities so that he/she can utilize
any of them at any time and carry out his/her learning.
The facilities
are numerous and include infrastructure, skills laboratory and other
laboratories, libraries and other book collections, which may be in hard or
soft formats, computers, Internet facilities and so many others. Above all,
however, facilitators, normally called teachers, must be available.
The roles of these facilitators
are to ensure that the appropriate facilities are available for the student
use, and to guide the student during the learning process. Such guidance may
take the form of overview lectures discussing the scope and depth of learning
required. It also takes the form of educating the student about the appropriate
use of the various facilities during the learning process.
The other major
role of the facilitator is to provide continuous assessment of the formative
type and, at specified intervals, of the summative type to show that
appropriate learning is taking place. Otherwise, the learner is responsible for
ensuring that his/her learning takes place most of the time.
The concept of
Problem-Based Learning (PBL) implies that learning shall be stimulated by use
of tutorial problems. A tutorial problem may be simply an objective, a
statement of fact, an idea, a description of a human experience, a description
of a patients illness, and a description of some phenomenon, occurrence or
event, a situation which may be clinical, theoretical, research based or real
life.
The essence of
PBL is that a TP, when analyzed, gives rise to a series of questions. To some
of these questions the learner can provide answers on the basis of his/her
previously acquired knowledge (prior knowledge). To answer the rest of the
questions, the learner must actively search for information; this is what leads
to the process of learning. This learning process takes place in the
background of the prior knowledge, and is therefore a build-on process.
Results
When the two strategies of
Student-Centered and Problem-Based Learning are applied together, a number of
results are achieved, including the following:
Stimulation of epistemic
curiosity (intrinsic interest) by relevant TPS by activation of Prior
knowledge. TPS provide chances for contextual learning. This allows for
easier retrieval and application of the knowledge acquired. This is so because
the information is acquired in a structural format. This information is also
acquired already integrated and not stratified as anatomy, physiology,
biochemistry e.t.c.
Student
participation i.e. active learning is enhanced and the knowledge so acquired is
retained for a longer time. Teamwork is enhanced because learners work in
small groups. This also leads to improvement of communication skills.
Self-directed learning skills are developed, leading to life-long
self-learning. Problem-solving skills are also developed.
Discussion
A number of
issues have been raised regarding Student-Centered/Problem-Based (SCPB)
Learning strategies by institutions wanting to adopt strategies. The main
issues will be discussed here. The first issue has been whether SCPB as a
learning strategy actually works (Vernon and Blake 1993). Institutions, which
have used this strategy properly, have found that it works. The operative word
here is properly. This implies that students must work in small groups of
five (5) to seven (7) in which the chairperson of the group can make every
member of the group contribute during the tutorial process.
Each group must
use the tutorial process properly, as outlined by the institution, i.e. follow
every step without looking for shortcuts. This will ensure that
problem-solving skills are developed, including proper sourcing for information
i.e. proper utilization of the Self-directed Learning (SDL) time and getting
used to learning the active way and for oneself. Properly written tutorial
problems must be used as the stimuli for learning and must not be repeatedly
used, except after a number of years of being kept in the bank.
Another issue
has been staff requirement. An institution that has the correct
staff-to-students ratio has enough staff for the SCPB. Moreover, in this
system, the distribution of the staff in each discipline is not as crucial as
in the traditional system because junior staff (Assistant Lecturer levels) can
effectively oversee the tutorial process. Nevertheless, Senior Staff are
required for guidance purposes through overview lecturers and other processes.
Issues regarding
the cost of implementing SCPB have also been raised. This strategy requires a
good library, an internet facility for students, a learning resource center and
other facilities that are not really so different from those traditional
institution should have been when it is using the I know it all and can give
it to you type of teaching system.
The argument
that this system is significantly more expensive to implement than the
traditional lecture system (TLS) is usually based on a failure to examine the
real requirements for the two systems. Moreover, considering the benefits of
using the SCPB strategy to the graduate over and above those of using TLS, this
strategy become more cost effective than the TLS.
The advantages
include encouraging active learning by activation of prior knowledge H.G
Schmidt (1993) stimulating epistemic curiosity and providing a chance for
elaboration of the subject matter and thus encouraging knowledge consolidation
during tutorial discussions; providing a chance for contextual integrated
learning and allowing knowledge to be stored in a structural format which is
easier to retrieve and utilize; development of self-directed learning
competencies leading to life-long self learning; improvement of communication
skills through continuous groups discussions. (Mennin & Major, 2002;
Nshaho 2004).
During the
Silver Jubilee celebrations, the members of the Physiological Society of
Nigeria and indeed all Biomedical Scientists need to rethink our educational
strategies with a view to introducing those that will enable us to empower our
students to acquire an ever increasing load of sciences at their own pace and
over a prolonged period even beyond their studentship period. One such
strategy to be considered is the SCPB Learning one.
Summary
The scientific load to be passed
on to undergraduate students in health professional programmes is increasing
all the time. It has reached a level where it can no longer be passed on
effectively by the traditional lecture system. It is argued that time has come
when strategies which can enable the student cope with such a heavy load should
be introduced. A case has been made for introducing the SCPB strategy because
of its so many other advantages it brings to the graduate trained using the
strategy.
References