Kalimat yang Menunjukkan Research Gap

So far, however, there has been little discussion about……
However, far too little attention has been paid to……
Most studies in X have only been carried out in a small number of areas.
The research to date has tended to focus on X rather than Y.
In addition, no research has been found that surveyed…….
So far this method has only been applied to……
Several studies have produced estimates of X (Smith, 2002; Jones, 2003), but there is still insufficient data for…..
However, there have been no controlled studies which compare differences in……
The experimental data are rather controversial, and there is no general agreement about……
Few researchers have addressed the problem / issue / question of …
Previous work has only focused on / been limited to / failed to address …
A basic / common / fundamental / crucial / major issue of …
The central / core problem of
A challenging / An intriguing / An important / A neglected area in the field of …
Current solutions to X are inconsistent / inadequate / incorrect / ineffective / inefficient / over-simplistic / unsatisfactory
Many hypotheses regarding X appear to be ill-defined / unfounded / not well grounded / unsupported / questionable / disputable / debatable
The characteristics of X are not well understood / are misunderstood / have not been dealt with in depth.
It is not yet known / has not yet been established whether X can do Y.
X is still poorly / not widely understood.
X is often impractical / not feasible / costly …
Techniques to solve X are computationally demanding / subject to high overheads / time consuming / impractical / frequently unfeasible.
A major defect / difficulty / drawback / disadvantage / flaw of X is …
One of the main issues in our knowledge of / what we know about X is a lack of …
This particular / specific area of X has been overlooked / has been neglected / remains unclear …
Despite this interest, no one to the best of our knowledge / as far as we know has studied …
Although this approach is interesting, it suffers from / fails to take into account / does not allow for …
In spite of / Despite its shortcomings, this method has been widely applied to …
However, there is still a need for / has been little discussion on …
Moreover, other solutions / research programs / approaches have failed to provide …
Most studies have only focused / tended to focus on …
To date / Until now this methodology has only been applied to …
There is still some / much / considerable controversy surrounding …
There has been some disagreement concerning / regarding / with regard to whether
There is little / no general agreement on …
The community has raised some issues / concerns about …
Concerns have arisen / been raised which question / call into question the validity of …
In the light of recent events in x, there is now some / much / considerable concern about …
What is not yet clear is the impact of X on ….
No previous study has investigated X.
There has been little quantitative analysis of ….
The neurobiological basis of this X is poorly understood.
Until recently, there has been no reliable evidence that ….
In addition, no research has been found that surveyed ….
Little is known about X and it is not clear what factors ….
This indicates a need to understand the various perceptions of X that exist among ….
So far this method has only been applied to ….
However, the evidence for this relationship is inconclusive ….
However, much uncertainty still exists about the relation between ….
However, there have been no controlled studies which compare differences in ….
In contrast, very little is known about X in non-mammalian vertebrates and in ….

Sani, Azlina Murad. Academic writing essentials: A guide for postgraduate students. UUM Press, 2016. p. 124

Wallwork, A. (2016). English for writing research papers. Springer.

Engineering Postgraduate Students Committee. 2010. Writing Phrasebank.

Morley, J. (2014). Academic phrasebank. Manchester: University of Manchester.[online] Available at: http://www. phrasebank. manchester. ac. uk/[Accessed 19.9. 2014].